import java.util.*;
 
class Main{
    public static void main(String[] args){
		char a = 'a';
		int[] arr = new int[26];
		Scanner scan = new Scanner(System.in);
		String str = "";
		while(scan.hasNext()) {
            String buf = scan.nextLine();
            str += buf;
        }

		char[] ch = str.toLowerCase().toCharArray();
		for(char alf : ch){
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		}
		for(int i=0; i<26; i++){
			System.out.println((char)(a + i) + " : " + arr[i]);
		}
    }
} import java.util.*; util.* java class Main{
    public static void main(String[] args){
		char a = 'a';
		int[] arr = new int[26];
		Scanner scan = new Scanner(System.in);
		String str = "";
		while(scan.hasNext()) {
            String buf = scan.nextLine();
            str += buf;
        }

		char[] ch = str.toLowerCase().toCharArray();
		for(char alf : ch){
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		}
		for(int i=0; i<26; i++){
			System.out.println((char)(a + i) + " : " + arr[i]);
		}
    }
} Main public static void main(String[] args){
		char a = 'a';
		int[] arr = new int[26];
		Scanner scan = new Scanner(System.in);
		String str = "";
		while(scan.hasNext()) {
            String buf = scan.nextLine();
            str += buf;
        }

		char[] ch = str.toLowerCase().toCharArray();
		for(char alf : ch){
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		}
		for(int i=0; i<26; i++){
			System.out.println((char)(a + i) + " : " + arr[i]);
		}
    } main {
		char a = 'a';
		int[] arr = new int[26];
		Scanner scan = new Scanner(System.in);
		String str = "";
		while(scan.hasNext()) {
            String buf = scan.nextLine();
            str += buf;
        }

		char[] ch = str.toLowerCase().toCharArray();
		for(char alf : ch){
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		}
		for(int i=0; i<26; i++){
			System.out.println((char)(a + i) + " : " + arr[i]);
		}
    } char a = 'a'; a 'a' int[] arr = new int[26]; arr new int[26] 26 Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String str = ""; str "" while(scan.hasNext()) {
            String buf = scan.nextLine();
            str += buf;
        } scan.hasNext() scan.hasNext scan {
            String buf = scan.nextLine();
            str += buf;
        } String buf = scan.nextLine(); buf scan.nextLine() scan.nextLine scan str += buf str buf char[] ch = str.toLowerCase().toCharArray(); ch str.toLowerCase().toCharArray() str.toLowerCase().toCharArray str.toLowerCase() str.toLowerCase str for(char alf : ch){
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		} char alf ch {
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		} {
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		} for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			} int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
				if(alf==(a+i)){
					arr[i] += 1;
				}
			} {
				if(alf==(a+i)){
					arr[i] += 1;
				}
			} if(alf==(a+i)){
					arr[i] += 1;
				} alf==(a+i) alf (a+i) a i {
					arr[i] += 1;
				} arr[i] += 1 arr[i] arr i 1 for(int i=0; i<26; i++){
			System.out.println((char)(a + i) + " : " + arr[i]);
		} int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
			System.out.println((char)(a + i) + " : " + arr[i]);
		} {
			System.out.println((char)(a + i) + " : " + arr[i]);
		} System.out.println((char)(a + i) + " : " + arr[i]) System.out.println System.out System System.out (char)(a + i) + " : " + arr[i] (char)(a + i) + " : " + arr[i] (char)(a + i) a i " : " arr[i] arr i String[] args args
import java.util.*;
 
class Main{
    public static void main(String[] args){
		char a = 'a';
		int[] arr = new int[26];
		Scanner scan = new Scanner(System.in);
		String str = "";
		while(scan.hasNext()) {
            String buf = scan.nextLine();
            str += buf;
        }

		char[] ch = str.toLowerCase().toCharArray();
		for(char alf : ch){
			for(int i=0; i<26; i++){
				if(alf==(a+i)){
					arr[i] += 1;
				}
			}
		}
		for(int i=0; i<26; i++){
			System.out.println((char)(a + i) + " : " + arr[i]);
		}
    }
}