import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String str = "";

        while(sc.hasNext()){
            String a = sc.nextLine();
            str = str + a;
        }

        int l = str.length();
        int[] num = new int[26];

        for(int i=0;i<l;i++){
            int c = (int)str.charAt(i);
            if('a'<=c && c<='z'){
                num[c-'a']++;
            }else if('A'<=c && c<='Z'){
                num[c-'A']++;
            }
        }

        for(int i=0;i<26;i++){
            System.out.printf("%c : %d\n", i+'a', num[i]);
        }
    }
}

 import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String str = "";

        while(sc.hasNext()){
            String a = sc.nextLine();
            str = str + a;
        }

        int l = str.length();
        int[] num = new int[26];

        for(int i=0;i<l;i++){
            int c = (int)str.charAt(i);
            if('a'<=c && c<='z'){
                num[c-'a']++;
            }else if('A'<=c && c<='Z'){
                num[c-'A']++;
            }
        }

        for(int i=0;i<26;i++){
            System.out.printf("%c : %d\n", i+'a', num[i]);
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String str = "";

        while(sc.hasNext()){
            String a = sc.nextLine();
            str = str + a;
        }

        int l = str.length();
        int[] num = new int[26];

        for(int i=0;i<l;i++){
            int c = (int)str.charAt(i);
            if('a'<=c && c<='z'){
                num[c-'a']++;
            }else if('A'<=c && c<='Z'){
                num[c-'A']++;
            }
        }

        for(int i=0;i<26;i++){
            System.out.printf("%c : %d\n", i+'a', num[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);

        String str = "";

        while(sc.hasNext()){
            String a = sc.nextLine();
            str = str + a;
        }

        int l = str.length();
        int[] num = new int[26];

        for(int i=0;i<l;i++){
            int c = (int)str.charAt(i);
            if('a'<=c && c<='z'){
                num[c-'a']++;
            }else if('A'<=c && c<='Z'){
                num[c-'A']++;
            }
        }

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

        String str = "";

        while(sc.hasNext()){
            String a = sc.nextLine();
            str = str + a;
        }

        int l = str.length();
        int[] num = new int[26];

        for(int i=0;i<l;i++){
            int c = (int)str.charAt(i);
            if('a'<=c && c<='z'){
                num[c-'a']++;
            }else if('A'<=c && c<='Z'){
                num[c-'A']++;
            }
        }

        for(int i=0;i<26;i++){
            System.out.printf("%c : %d\n", i+'a', num[i]);
        }
    }
} public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String str = "";

        while(sc.hasNext()){
            String a = sc.nextLine();
            str = str + a;
        }

        int l = str.length();
        int[] num = new int[26];

        for(int i=0;i<l;i++){
            int c = (int)str.charAt(i);
            if('a'<=c && c<='z'){
                num[c-'a']++;
            }else if('A'<=c && c<='Z'){
                num[c-'A']++;
            }
        }

        for(int i=0;i<26;i++){
            System.out.printf("%c : %d\n", i+'a', num[i]);
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String str = "";

        while(sc.hasNext()){
            String a = sc.nextLine();
            str = str + a;
        }

        int l = str.length();
        int[] num = new int[26];

        for(int i=0;i<l;i++){
            int c = (int)str.charAt(i);
            if('a'<=c && c<='z'){
                num[c-'a']++;
            }else if('A'<=c && c<='Z'){
                num[c-'A']++;
            }
        }

        for(int i=0;i<26;i++){
            System.out.printf("%c : %d\n", i+'a', num[i]);
        }
    }
}


