import java.util.Scanner;

class Main{
	public static void main(String[] args) 	{
		Scanner sc = new Scanner(System.in);
		int alphabet[];
		alphabet = new int[26];
		for(int i = 0;i < 26; i++) {
			alphabet[i] = 0;
		}
		while(sc.hasNext()) {
			String str = sc.next();
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			}
		}
		for(int i = 0;i < 26;i++) {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		}
		sc.close();
	}
} import java.util.Scanner; Scanner java.util class Main{
	public static void main(String[] args) 	{
		Scanner sc = new Scanner(System.in);
		int alphabet[];
		alphabet = new int[26];
		for(int i = 0;i < 26; i++) {
			alphabet[i] = 0;
		}
		while(sc.hasNext()) {
			String str = sc.next();
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			}
		}
		for(int i = 0;i < 26;i++) {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		}
		sc.close();
	}
} Main public static void main(String[] args) 	{
		Scanner sc = new Scanner(System.in);
		int alphabet[];
		alphabet = new int[26];
		for(int i = 0;i < 26; i++) {
			alphabet[i] = 0;
		}
		while(sc.hasNext()) {
			String str = sc.next();
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			}
		}
		for(int i = 0;i < 26;i++) {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		}
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int alphabet[];
		alphabet = new int[26];
		for(int i = 0;i < 26; i++) {
			alphabet[i] = 0;
		}
		while(sc.hasNext()) {
			String str = sc.next();
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			}
		}
		for(int i = 0;i < 26;i++) {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		}
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int alphabet[]; alphabet alphabet = new int[26] alphabet new int[26] 26 for(int i = 0;i < 26; i++) {
			alphabet[i] = 0;
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			alphabet[i] = 0;
		} {
			alphabet[i] = 0;
		} alphabet[i] = 0 alphabet[i] alphabet i 0 while(sc.hasNext()) {
			String str = sc.next();
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			}
		} sc.hasNext() sc.hasNext sc {
			String str = sc.next();
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			}
		} String str = sc.next(); str sc.next() sc.next sc str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			} int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str i++ i++ i {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			} {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			} if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++; 97 <= str.charAt(i) && str.charAt(i) <= 122 97 <= str.charAt(i) 97 str.charAt(i) str.charAt str i str.charAt(i) <= 122 str.charAt(i) str.charAt str i 122 alphabet[str.charAt(i) - 97]++ alphabet[str.charAt(i) - 97] alphabet str.charAt(i) - 97 str.charAt(i) str.charAt str i 97 for(int i = 0;i < 26;i++) {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		} {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		} System.out.printf("%c : %d\n",i + 97,alphabet[i]) System.out.printf System.out System System.out "%c : %d\n" i + 97 i 97 alphabet[i] alphabet i sc.close() sc.close sc String[] args args
import java.util.Scanner;

class Main{
	public static void main(String[] args) 	{
		Scanner sc = new Scanner(System.in);
		int alphabet[];
		alphabet = new int[26];
		for(int i = 0;i < 26; i++) {
			alphabet[i] = 0;
		}
		while(sc.hasNext()) {
			String str = sc.next();
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++) {
				if(97 <= str.charAt(i) && str.charAt(i) <= 122) alphabet[str.charAt(i) - 97]++;
			}
		}
		for(int i = 0;i < 26;i++) {
			System.out.printf("%c : %d\n",i + 97,alphabet[i]);
		}
		sc.close();
	}
}
