import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		//??£??????????????????????????????????????°
		String strLine = "";

		while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		}

		//?°????????????????
		strLine = strLine.toLowerCase();
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();
		//System.out.println("aryLine.length:" + aryLine.length);

		char x = 'a';

		//int[] intCount = new int[26];

		//a???z?????§?????°?????????
		for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		//??£??????????????????????????????????????°
		String strLine = "";

		while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		}

		//?°????????????????
		strLine = strLine.toLowerCase();
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();
		//System.out.println("aryLine.length:" + aryLine.length);

		char x = 'a';

		//int[] intCount = new int[26];

		//a???z?????§?????°?????????
		for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

} Main public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		//??£??????????????????????????????????????°
		String strLine = "";

		while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		}

		//?°????????????????
		strLine = strLine.toLowerCase();
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();
		//System.out.println("aryLine.length:" + aryLine.length);

		char x = 'a';

		//int[] intCount = new int[26];

		//a???z?????§?????°?????????
		for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	} main {
		// TODO ?????????????????????????????????????????????

		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		//??£??????????????????????????????????????°
		String strLine = "";

		while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		}

		//?°????????????????
		strLine = strLine.toLowerCase();
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();
		//System.out.println("aryLine.length:" + aryLine.length);

		char x = 'a';

		//int[] intCount = new int[26];

		//a???z?????§?????°?????????
		for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	} BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in)); insBR new BufferedReader(new InputStreamReader(System.in)) String strLine = ""; strLine "" while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		} true {
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		} try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			} catch(IOException e){
				System.out.println(e);
			} IOException e {
				System.out.println(e);
			} System.out.println(e) System.out.println System.out System System.out e {

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			} String strScan = insBR.readLine(); strScan insBR.readLine() insBR.readLine insBR if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				} "".equals(strScan) || strScan == null "".equals(strScan) "".equals "" strScan strScan == null strScan null {
					break;
				} break; {
					strLine += strScan;
				} strLine += strScan strLine strScan strLine = strLine.toLowerCase() strLine strLine.toLowerCase() strLine.toLowerCase strLine char[] aryLine= strLine.toCharArray(); aryLine strLine.toCharArray() strLine.toCharArray strLine char x = 'a'; x 'a' for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		} int i = 'a'; int i = 'a'; i 'a' i <= 'z' i 'z' i++ i++ i {
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		} {
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		} int intCount = 0; intCount 0 for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			} int j = 0; int j = 0; j 0 j < aryLine.length j aryLine.length aryLine aryLine.length j++ j++ j {

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			} {

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			} int alphNum = aryLine[j]; alphNum aryLine[j] aryLine j if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				} i == alphNum i alphNum {
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				} intCount++ intCount System.out.print(x++) System.out.print System.out System System.out x++ x System.out.println(" : " + intCount) System.out.println System.out System System.out " : " + intCount " : " intCount String[] args args public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		//??£??????????????????????????????????????°
		String strLine = "";

		while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		}

		//?°????????????????
		strLine = strLine.toLowerCase();
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();
		//System.out.println("aryLine.length:" + aryLine.length);

		char x = 'a';

		//int[] intCount = new int[26];

		//a???z?????§?????°?????????
		for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

} public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		//??£??????????????????????????????????????°
		String strLine = "";

		while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		}

		//?°????????????????
		strLine = strLine.toLowerCase();
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();
		//System.out.println("aryLine.length:" + aryLine.length);

		char x = 'a';

		//int[] intCount = new int[26];

		//a???z?????§?????°?????????
		for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		//??£??????????????????????????????????????°
		String strLine = "";

		while(true){
			try{

				String strScan = insBR.readLine();
				if("".equals(strScan) || strScan == null){
					break;
				}else{
					strLine += strScan;
				}


			}catch(IOException e){
				System.out.println(e);
			}

		}

		//?°????????????????
		strLine = strLine.toLowerCase();
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();
		//System.out.println("aryLine.length:" + aryLine.length);

		char x = 'a';

		//int[] intCount = new int[26];

		//a???z?????§?????°?????????
		for(int i = 'a'; i <= 'z'; i++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;
			//????????????length?????°?????????
			for(int j = 0; j < aryLine.length; j++){

				//System.out.println("int i:" + i );

				int alphNum = aryLine[j];
				//System.out.println("alphNum:" + alphNum);
				//??¢???????????????????????????????????¢??????
				if( i == alphNum){
					//System.out.print("i:" + i + "/j:" + alphNum);
					//System.out.print(" ");
					intCount++;
				}
			}

			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

}