import java.util.Scanner;

public class Main {
	public static Scanner sc;
	public static void main(String[] args) {
		int p;
		int i=0;
        sc =new Scanner(System.in);  
		int count[] = new int[26];
		String str;
		char c;
		
	    
		while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		}
		for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		}
	}
	
}
 import java.util.Scanner; Scanner java.util public class Main {
	public static Scanner sc;
	public static void main(String[] args) {
		int p;
		int i=0;
        sc =new Scanner(System.in);  
		int count[] = new int[26];
		String str;
		char c;
		
	    
		while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		}
		for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		}
	}
	
} Main public static Scanner sc; sc public static void main(String[] args) {
		int p;
		int i=0;
        sc =new Scanner(System.in);  
		int count[] = new int[26];
		String str;
		char c;
		
	    
		while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		}
		for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		}
	} main {
		int p;
		int i=0;
        sc =new Scanner(System.in);  
		int count[] = new int[26];
		String str;
		char c;
		
	    
		while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		}
		for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		}
	} int p; p int i=0; i 0 sc =new Scanner(System.in) sc new Scanner(System.in) int count[] = new int[26]; count new int[26] 26 String str; str char c; c while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		} sc.hasNext() sc.hasNext sc {
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		} str=sc.next() str sc.next() sc.next sc for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			} int j=0; int j=0; j 0 j<str.length() j str.length() str.length str j++ j++ j {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			} {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			} c=str.charAt(j) c str.charAt(j) str.charAt str j if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				} c>='A'&&c<='Z' c>='A' c 'A' c<='Z' c 'Z' {
					c+=32;
				} c+=32 c 32 if(c>='a'&&c<='z') {
					
				}else {
					continue;
				} c>='a'&&c<='z' c>='a' c 'a' c<='z' c 'z' {
					
				} {
					continue;
				} continue; p= c-'a' p c-'a' c 'a' count[p]++ count[p] count p for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		} i=0; i=0 i 0 i<26 i 26 i++ i++ i {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		} {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		} System.out.printf("%c : %d\n",i+'a',count[i]) System.out.printf System.out System System.out "%c : %d\n" i+'a' i 'a' count[i] count i String[] args args public class Main {
	public static Scanner sc;
	public static void main(String[] args) {
		int p;
		int i=0;
        sc =new Scanner(System.in);  
		int count[] = new int[26];
		String str;
		char c;
		
	    
		while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		}
		for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		}
	}
	
} public class Main {
	public static Scanner sc;
	public static void main(String[] args) {
		int p;
		int i=0;
        sc =new Scanner(System.in);  
		int count[] = new int[26];
		String str;
		char c;
		
	    
		while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		}
		for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		}
	}
	
} Main
import java.util.Scanner;

public class Main {
	public static Scanner sc;
	public static void main(String[] args) {
		int p;
		int i=0;
        sc =new Scanner(System.in);  
		int count[] = new int[26];
		String str;
		char c;
		
	    
		while(sc.hasNext()){
			str=sc.next();
			for(int j=0;j<str.length();j++) {
				c=str.charAt(j);
				if(c>='A'&&c<='Z') {
					c+=32;
				}else if(c>='a'&&c<='z') {
					
				}else {
					continue;
				}
				p= c-'a';
				count[p]++;
			}
		}
		for(i=0;i<26;i++) {
			System.out.printf("%c : %d\n",i+'a',count[i]);
		}
	}
	
}

