import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        }
        String s = sb.toString();
        int[] count = new int[26];
        for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        }
        String s = sb.toString();
        int[] count = new int[26];
        for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        }
        String s = sb.toString();
        int[] count = new int[26];
        for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        }
        String s = sb.toString();
        int[] count = new int[26];
        for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) StringBuilder sb = new StringBuilder(); sb new StringBuilder() while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        } sc.hasNext() sc.hasNext sc {
            sb.append(sc.nextLine().toLowerCase());
        } sb.append(sc.nextLine().toLowerCase()) sb.append sb sc.nextLine().toLowerCase() sc.nextLine().toLowerCase sc.nextLine() sc.nextLine sc String s = sb.toString(); s sb.toString() sb.toString sb int[] count = new int[26]; count new int[26] 26 for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        } {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        } int point = s.codePointAt(i); point s.codePointAt(i) s.codePointAt s i if (97 <= point && point <= 122) {
                count[point - 97]++;
            } 97 <= point && point <= 122 97 <= point 97 point point <= 122 point 122 {
                count[point - 97]++;
            } count[point - 97]++ count[point - 97] count point - 97 point 97 for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        } int i = 0; int i = 0; i 0 i < count.length i count.length count count.length i++ i++ i {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        } {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        } System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]) System.out.println System.out System System.out Character.toChars(i + 97)[0] + " : " + count[i] Character.toChars(i + 97)[0] + " : " + count[i] Character.toChars(i + 97)[0] Character.toChars(i + 97) Character.toChars Character i + 97 i 97 0 " : " count[i] count i String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        }
        String s = sb.toString();
        int[] count = new int[26];
        for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        }
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        }
        String s = sb.toString();
        int[] count = new int[26];
        for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        }
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();
        while (sc.hasNext()) {
            sb.append(sc.nextLine().toLowerCase());
        }
        String s = sb.toString();
        int[] count = new int[26];
        for (int i = 0; i < s.length(); i++) {
            int point = s.codePointAt(i);
            if (97 <= point && point <= 122) {
                count[point - 97]++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            System.out.println(Character.toChars(i + 97)[0] + " : " + count[i]);
        }
    }
}