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

public class Main {
	public static void main(String[] args) throws IOException{
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready());
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
}
} 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) throws IOException{
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready());
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
}
} Main public static void main(String[] args) throws IOException{
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready());
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
} main {
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready());
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
} Character objChar1; objChar1 char c; c int cordchange=97; cordchange 97 int total[]=new int[26] ; total new int[26] 26 int i=0 i 0 num num sum; sum InputStreamReader isr = new InputStreamReader(System.in); isr new InputStreamReader(System.in) BufferedReader br = new BufferedReader(isr); br new BufferedReader(isr) do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready()); br.ready() br.ready br {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		} String str = br.readLine(); str br.readLine() br.readLine br if (str == null) {
		        continue;
		    } str == null str null {
		        continue;
		    } continue; for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			} i = 0; i = 0 i 0 i < str.length() i str.length() str.length str i++ i++ i {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			} {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			} c = str.charAt(i) c str.charAt(i) str.charAt str i c=Character.toLowerCase(c) c Character.toLowerCase(c) Character.toLowerCase Character c if(Character.isLetter(c))
					total[c-cordchange]++; Character.isLetter(c) Character.isLetter Character c total[c-cordchange]++ total[c-cordchange] total c-cordchange c cordchange for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		} i=0; i=0 i 0 i<26 i 26 i++ i++ i {
			System.out.println((char)('a'+i)+" : "+total[i]);
		} {
			System.out.println((char)('a'+i)+" : "+total[i]);
		} System.out.println((char)('a'+i)+" : "+total[i]) System.out.println System.out System System.out (char)('a'+i)+" : "+total[i] (char)('a'+i)+" : "+total[i] (char)('a'+i) 'a' i " : " total[i] total i String[] args args public class Main {
	public static void main(String[] args) throws IOException{
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready());
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
}
} public class Main {
	public static void main(String[] args) throws IOException{
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready());
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws IOException{
		Character objChar1;

		char c;
		int cordchange=97;//??????????????????????????????????????????????????°???
		int total[]=new int[26] ;
		int i=0, num, sum;
		InputStreamReader isr = new InputStreamReader(System.in);
		
		BufferedReader br = new BufferedReader(isr);
		
		do {
			String str = br.readLine();
			if (str == null) {
		        continue;
		    }
		
		for (i = 0; i < str.length(); i++) {
				c = str.charAt(i);
				c=Character.toLowerCase(c);
				if(Character.isLetter(c))
					total[c-cordchange]++;
				
			}
		
		}while (br.ready());
		for(i=0;i<26;i++)
		{
			System.out.println((char)('a'+i)+" : "+total[i]);
		}
}
}