import java.util.Scanner;
  
class Main{
  public static void main(String[] arg){
    String input;
    int [] count = new int[26];
 
    Scanner in = new Scanner(System.in);

    while(in.hasNext()){
        input = in.nextLine();
        String tmp = input.toLowerCase();

        for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        }
    }

    for(int i=0; i<count.length; i++){

        int ch = 'a' + i;
        System.out.printf("%c : %d\n", ch, count[i]);
    }
  }
} import java.util.Scanner; Scanner java.util class Main{
  public static void main(String[] arg){
    String input;
    int [] count = new int[26];
 
    Scanner in = new Scanner(System.in);

    while(in.hasNext()){
        input = in.nextLine();
        String tmp = input.toLowerCase();

        for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        }
    }

    for(int i=0; i<count.length; i++){

        int ch = 'a' + i;
        System.out.printf("%c : %d\n", ch, count[i]);
    }
  }
} Main public static void main(String[] arg){
    String input;
    int [] count = new int[26];
 
    Scanner in = new Scanner(System.in);

    while(in.hasNext()){
        input = in.nextLine();
        String tmp = input.toLowerCase();

        for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        }
    }

    for(int i=0; i<count.length; i++){

        int ch = 'a' + i;
        System.out.printf("%c : %d\n", ch, count[i]);
    }
  } main {
    String input;
    int [] count = new int[26];
 
    Scanner in = new Scanner(System.in);

    while(in.hasNext()){
        input = in.nextLine();
        String tmp = input.toLowerCase();

        for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        }
    }

    for(int i=0; i<count.length; i++){

        int ch = 'a' + i;
        System.out.printf("%c : %d\n", ch, count[i]);
    }
  } String input; input int [] count = new int[26]; count new int[26] 26 Scanner in = new Scanner(System.in); in new Scanner(System.in) while(in.hasNext()){
        input = in.nextLine();
        String tmp = input.toLowerCase();

        for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        }
    } in.hasNext() in.hasNext in {
        input = in.nextLine();
        String tmp = input.toLowerCase();

        for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        }
    } input = in.nextLine() input in.nextLine() in.nextLine in String tmp = input.toLowerCase(); tmp input.toLowerCase() input.toLowerCase input for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        } int i=0; int i=0; i 0 i<tmp.length() i tmp.length() tmp.length tmp i++ i++ i {
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        } {
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        } int ch = tmp.charAt(i); ch tmp.charAt(i) tmp.charAt tmp i if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            } Character.isAlphabetic(ch) Character.isAlphabetic Character ch {
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            } count[ch-'a']++ count[ch-'a'] count ch-'a' ch 'a' for(int i=0; i<count.length; i++){

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

        int ch = 'a' + i;
        System.out.printf("%c : %d\n", ch, count[i]);
    } {

        int ch = 'a' + i;
        System.out.printf("%c : %d\n", ch, count[i]);
    } int ch = 'a' + i; ch 'a' + i 'a' i System.out.printf("%c : %d\n", ch, count[i]) System.out.printf System.out System System.out "%c : %d\n" ch count[i] count i String[] arg arg
import java.util.Scanner;
  
class Main{
  public static void main(String[] arg){
    String input;
    int [] count = new int[26];
 
    Scanner in = new Scanner(System.in);

    while(in.hasNext()){
        input = in.nextLine();
        String tmp = input.toLowerCase();

        for(int i=0; i<tmp.length(); i++){
            
            int ch = tmp.charAt(i);
            if(Character.isAlphabetic(ch)){
                // debug int index = ch - 'a';
                // debug System.out.println(index);
                count[ch-'a']++;
            }
        }
    }

    for(int i=0; i<count.length; i++){

        int ch = 'a' + i;
        System.out.printf("%c : %d\n", ch, count[i]);
    }
  }
}