import java.util.*;
import java.io.*;

public class Main {

	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		int alph[]=new int[26];
		
		while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		}
		
		
		for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		}
		out.flush();
	}

}
 import java.util.*; util.* java import java.io.*; io.* java public class Main {

	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		int alph[]=new int[26];
		
		while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		}
		
		
		for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		}
		out.flush();
	}

} Main public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		int alph[]=new int[26];
		
		while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		}
		
		
		for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		}
		out.flush();
	} main {
		Scanner in=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		int alph[]=new int[26];
		
		while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		}
		
		
		for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		}
		out.flush();
	} Scanner in=new Scanner(System.in); in new Scanner(System.in) PrintWriter out=new PrintWriter(System.out); out new PrintWriter(System.out) int alph[]=new int[26]; alph new int[26] 26 while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		} in.hasNext() in.hasNext in {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		} String str=in.nextLine(); str in.nextLine() in.nextLine in char C[]=str.toCharArray(); C str.toCharArray() str.toCharArray str for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			} int i=0; int i=0; i 0 i<C.length i C.length C C.length i++ i++ i {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			} {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			} if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++; C[i]>=65 && C[i]<=90 C[i]>=65 C[i] C i 65 C[i]<=90 C[i] C i 90 alph[C[i]-65]++ alph[C[i]-65] alph C[i]-65 C[i] C i 65 if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++; C[i]>=97 && C[i]<=122 C[i]>=97 C[i] C i 97 C[i]<=122 C[i] C i 122 alph[C[i]-97]++ alph[C[i]-97] alph C[i]-97 C[i] C i 97 for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		} int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		} {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		} char c=(char)(i+97); c (char)(i+97) i 97 System.out.println(c+" : "+alph[i]) System.out.println System.out System System.out c+" : "+alph[i] c+" : "+alph[i] c " : " alph[i] alph i out.flush() out.flush out String[] args args public class Main {

	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		int alph[]=new int[26];
		
		while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		}
		
		
		for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		}
		out.flush();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		int alph[]=new int[26];
		
		while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		}
		
		
		for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		}
		out.flush();
	}

} Main
import java.util.*;
import java.io.*;

public class Main {

	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		int alph[]=new int[26];
		
		while(in.hasNext()) {
			String str=in.nextLine();char C[]=str.toCharArray();
			for(int i=0;i<C.length;i++) {
				if(C[i]>=65 && C[i]<=90)alph[C[i]-65]++;
				else if(C[i]>=97 && C[i]<=122)alph[C[i]-97]++;
			}
		}
		
		
		for(int i=0;i<26;i++) {
			char c=(char)(i+97);
			System.out.println(c+" : "+alph[i]);
		}
		out.flush();
	}

}

