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