import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str,str1;
        int n[] = new int[26];
        char c = 'a';
        while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        }
        for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        }
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str,str1;
        int n[] = new int[26];
        char c = 'a';
        while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        }
        for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        }
    }
} Main public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str,str1;
        int n[] = new int[26];
        char c = 'a';
        while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        }
        for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        }
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str,str1;
        int n[] = new int[26];
        char c = 'a';
        while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        }
        for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        }
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str str str1; str1 int n[] = new int[26]; n new int[26] 26 char c = 'a'; c 'a' while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        } (str = br.readLine())!=null (str = br.readLine()) str br.readLine() br.readLine br null {
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        } str1 = str.toLowerCase() str1 str.toLowerCase() str.toLowerCase str for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            } int i=0; int i=0; i 0 i<str1.length() i str1.length() str1.length str1 i++ i++ i {
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            } {
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            } int a = str1.charAt(i); a str1.charAt(i) str1.charAt str1 i if(Character.isAlphabetic(a)){
                    n[a-c]++;
                } Character.isAlphabetic(a) Character.isAlphabetic Character a {
                    n[a-c]++;
                } n[a-c]++ n[a-c] n a-c a c for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        } int i=0; int i=0; i 0 i<n.length i n.length n n.length i++ i++ i {
            System.out.println(c++ +" : "+n[i]);
        } {
            System.out.println(c++ +" : "+n[i]);
        } System.out.println(c++ +" : "+n[i]) System.out.println System.out System System.out c++ +" : "+n[i] c++ +" : "+n[i] c++ c " : " n[i] n i String[] args args public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str,str1;
        int n[] = new int[26];
        char c = 'a';
        while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        }
        for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        }
    }
} public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str,str1;
        int n[] = new int[26];
        char c = 'a';
        while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        }
        for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        }
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str,str1;
        int n[] = new int[26];
        char c = 'a';
        while((str = br.readLine())!=null){
            str1 = str.toLowerCase();
            for(int i=0;i<str1.length();i++){
                int a = str1.charAt(i);
                if(Character.isAlphabetic(a)){
                    n[a-c]++;
                }
            }
        }
        for(int i=0;i<n.length;i++){
            System.out.println(c++ +" : "+n[i]);
        }
    }
}