import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int chcnt[] = new int[26]; chcnt new int[26] 26 String str = ""; str "" while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        } sc.hasNext() sc.hasNext sc {
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        } str = sc.nextLine() str sc.nextLine() sc.nextLine sc str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            } int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str i++ i++ i {
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            } {
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            } char ch = str.charAt(i); ch str.charAt(i) str.charAt str i if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++; ch <= 'z' && ch >= 'a' ch <= 'z' ch 'z' ch >= 'a' ch 'a' chcnt[ch - 'a']++ chcnt[ch - 'a'] chcnt ch - 'a' ch 'a' for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        } int i = 0; int i = 0; i 0 i < chcnt.length i chcnt.length chcnt chcnt.length i++ i++ i {
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        } {
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        } System.out.println((char)('a' + i) + " : " + chcnt[i]) System.out.println System.out System System.out (char)('a' + i) + " : " + chcnt[i] (char)('a' + i) + " : " + chcnt[i] (char)('a' + i) 'a' i " : " chcnt[i] chcnt i String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int chcnt[] = new int[26];
        String str = "";
        while(sc.hasNext()){
            str = sc.nextLine();
            str = str.toLowerCase();
            for(int i = 0; i < str.length(); i++ ){
                char ch = str.charAt(i);
                if(ch <= 'z' && ch >= 'a') chcnt[ch - 'a']++;
            }
        }
        for(int i = 0; i < chcnt.length; i++){
            System.out.println((char)('a' + i) + " : " + chcnt[i]);
        }
    }
}