import java.io.*;

public class Main {
    public static void main(String[] arg){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[1000];
        try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        }
        for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        }
    }
} import java.io.*; io.* java public class Main {
    public static void main(String[] arg){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[1000];
        try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        }
        for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        }
    }
} Main public static void main(String[] arg){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[1000];
        try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        }
        for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        }
    } main {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[1000];
        try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        }
        for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        }
    } BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); reader new BufferedReader(new InputStreamReader(System.in)) String str = "abcdefghijklmnopqrstuvwxyz"; str "abcdefghijklmnopqrstuvwxyz" int[] count = new int[1000]; count new int[1000] 1000 try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        } catch(IOException e){
            System.out.println(e);
        } IOException e {
            System.out.println(e);
        } System.out.println(e) System.out.println System.out System System.out e {
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        } String x; x x = reader.readLine() x reader.readLine() reader.readLine reader while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            } x != null x null {
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            } x = x.toLowerCase() x x.toLowerCase() x.toLowerCase x for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            } int n =0; int n =0; n 0 n < x.length() n x.length() x.length x n++ n++ n {
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            } {
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            } if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue; x.charAt(n) == ' ' || x.charAt(n)=='.' x.charAt(n) == ' ' x.charAt(n) x.charAt x n ' ' x.charAt(n)=='.' x.charAt(n) x.charAt x n '.' continue; char z = x.charAt(n); z x.charAt(n) x.charAt x n count[ z ]++ count[ z ] count z x = reader.readLine() x reader.readLine() reader.readLine reader for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        } int i = 0 ; int i = 0 ; i 0 i<str.length() i str.length() str.length str i++ i++ i {
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        } {
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        } char y = str.charAt(i); y str.charAt(i) str.charAt str i System.out.println(str.charAt(i) +" : "+ count[y] ) System.out.println System.out System System.out str.charAt(i) +" : "+ count[y] str.charAt(i) +" : "+ count[y] str.charAt(i) str.charAt str i " : " count[y] count y String[] arg arg public class Main {
    public static void main(String[] arg){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[1000];
        try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        }
        for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        }
    }
} public class Main {
    public static void main(String[] arg){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[1000];
        try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        }
        for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        }
    }
} Main
import java.io.*;

public class Main {
    public static void main(String[] arg){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = "abcdefghijklmnopqrstuvwxyz";
        int[] count = new int[1000];
        try{
        String x;
            x = reader.readLine();
            while(x != null){
            x = x.toLowerCase();
            for(int n =0; n < x.length() ; n++){
                if(x.charAt(n) == ' ' || x.charAt(n)=='.') continue;
                char z = x.charAt(n);
                count[ z ]++;
            }
            x = reader.readLine();
            }
        }catch(IOException e){
            System.out.println(e);
        }
        for(int i = 0 ; i<str.length(); i++){
            char y = str.charAt(i);
            System.out.println(str.charAt(i) +" : "+ count[y] );
        }
    }
}
