import java.util.Scanner;

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

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