import java.util.Scanner;

public class Main{

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

		Scanner scan = new Scanner(System.in);
		//??£??????????????????????????????????????°
		String strLine = "";
		boolean isContinue = true;
		while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		}
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();

		char x = 'a';
		//a???z?????§?????°?????????
		for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

} import java.util.Scanner; Scanner java.util public class Main{

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

		Scanner scan = new Scanner(System.in);
		//??£??????????????????????????????????????°
		String strLine = "";
		boolean isContinue = true;
		while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		}
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();

		char x = 'a';
		//a???z?????§?????°?????????
		for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

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

		Scanner scan = new Scanner(System.in);
		//??£??????????????????????????????????????°
		String strLine = "";
		boolean isContinue = true;
		while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		}
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();

		char x = 'a';
		//a???z?????§?????°?????????
		for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

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

		Scanner scan = new Scanner(System.in);
		//??£??????????????????????????????????????°
		String strLine = "";
		boolean isContinue = true;
		while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		}
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();

		char x = 'a';
		//a???z?????§?????°?????????
		for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String strLine = ""; strLine "" boolean isContinue = true; isContinue true while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		} isContinue {

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		} if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			} scan.hasNext() scan.hasNext scan {
				String strScan = scan.nextLine();
				strLine += strScan;
				
			} String strScan = scan.nextLine(); strScan scan.nextLine() scan.nextLine scan strLine += strScan strLine strScan {
				scan.close();
				break;
			} scan.close() scan.close scan break; char[] aryLine= strLine.toCharArray(); aryLine strLine.toCharArray() strLine.toCharArray strLine char x = 'a'; x 'a' for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		} int j = 'a'; int j = 'a'; j 'a' j <= 'z' j 'z' j++ j++ j {
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		} {
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

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

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			} int i = 0; int i = 0; i 0 i < aryLine.length i aryLine.length aryLine aryLine.length i++ i++ i {

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			} {

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			} if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				} Character.isUpperCase(aryLine[i]) Character.isUpperCase Character aryLine[i] aryLine i {
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				} aryLine[i] = Character.toLowerCase(aryLine[i]) aryLine[i] aryLine i Character.toLowerCase(aryLine[i]) Character.toLowerCase Character aryLine[i] aryLine i if( j == aryLine[i]){
					intCount++;
				} j == aryLine[i] j aryLine[i] aryLine i {
					intCount++;
				} intCount++ intCount String az = String.valueOf(j); az String.valueOf(j) String.valueOf String j 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 ?????????????????????????????????????????????

		Scanner scan = new Scanner(System.in);
		//??£??????????????????????????????????????°
		String strLine = "";
		boolean isContinue = true;
		while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		}
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();

		char x = 'a';
		//a???z?????§?????°?????????
		for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

} public class Main{

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

		Scanner scan = new Scanner(System.in);
		//??£??????????????????????????????????????°
		String strLine = "";
		boolean isContinue = true;
		while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		}
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();

		char x = 'a';
		//a???z?????§?????°?????????
		for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

} Main
import java.util.Scanner;

public class Main{

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

		Scanner scan = new Scanner(System.in);
		//??£??????????????????????????????????????°
		String strLine = "";
		boolean isContinue = true;
		while(isContinue){

			
			if(scan.hasNext()){
				String strScan = scan.nextLine();
				strLine += strScan;
				
			}else{
				scan.close();
				break;
			}



		}
		//System.out.println("strLine:" + strLine);

		//str???????§£??????char[]???????´?
		char[] aryLine= strLine.toCharArray();

		char x = 'a';
		//a???z?????§?????°?????????
		for(int j = 'a'; j <= 'z'; j++){
			//??¢????????????????????????????????????????????°
			int intCount = 0;



			for(int i = 0; i < aryLine.length; i++){

				//??§???????????£?????´???????°????????????????
				if(Character.isUpperCase(aryLine[i])){
					aryLine[i] = Character.toLowerCase(aryLine[i]);
				}
				//??¢???????????????????????????????????¢??????
				if( j == aryLine[i]){
					intCount++;
				}
			}
			String az = String.valueOf(j);
			System.out.print(x++);
			System.out.println(" : " + intCount);

		}
	}

}