import java.util.Scanner;
  
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int[] alpha = new int['z' - 'a' + 1];
        while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        }
        for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int[] alpha = new int['z' - 'a' + 1];
        while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        }
        for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        }
    }
} Main public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int[] alpha = new int['z' - 'a' + 1];
        while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        }
        for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        }
    } main {
        Scanner scan = new Scanner(System.in);
        int[] alpha = new int['z' - 'a' + 1];
        while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        }
        for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        }
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int[] alpha = new int['z' - 'a' + 1]; alpha new int['z' - 'a' + 1] 'z' - 'a' + 1 'z' - 'a' 'z' 'a' 1 while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        } scan.hasNext() scan.hasNext scan {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        } String str = scan.next().toLowerCase(); str scan.next().toLowerCase() scan.next().toLowerCase scan.next() scan.next scan for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            } int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str i++ i++ i {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            } {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            } if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                } Character.isLetter(str.charAt(i)) Character.isLetter Character str.charAt(i) str.charAt str i {
                    alpha[str.charAt(i) - 'a']++;
                } alpha[str.charAt(i) - 'a']++ alpha[str.charAt(i) - 'a'] alpha str.charAt(i) - 'a' str.charAt(i) str.charAt str i 'a' for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        } int i = 0; int i = 0; i 0 i < alpha.length i alpha.length alpha alpha.length ++i ++i i {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        } {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        } System.out.println((char)('a' + i) + " : " + alpha[i]) System.out.println System.out System System.out (char)('a' + i) + " : " + alpha[i] (char)('a' + i) + " : " + alpha[i] (char)('a' + i) 'a' i " : " alpha[i] alpha i String[] args args public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int[] alpha = new int['z' - 'a' + 1];
        while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        }
        for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int[] alpha = new int['z' - 'a' + 1];
        while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        }
        for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        }
    }
} Main
import java.util.Scanner;
  
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int[] alpha = new int['z' - 'a' + 1];
        while (scan.hasNext()) {
            String str = scan.next().toLowerCase();
            for (int i = 0; i < str.length(); i++) {
                if (Character.isLetter(str.charAt(i))) {
                    alpha[str.charAt(i) - 'a']++;
                }
            }
        }
        for (int i = 0; i < alpha.length; ++i) {
            System.out.println((char)('a' + i) + " : " + alpha[i]);
        }
    }
}