import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int[] count = new int[26];
        while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        }
        for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        }
        sc.close();
        
    }

} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int[] count = new int[26];
        while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        }
        for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        }
        sc.close();
        
    }

} Main public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int[] count = new int[26];
        while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        }
        for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        }
        sc.close();
        
    } main {

        Scanner sc = new Scanner(System.in);
        int[] count = new int[26];
        while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        }
        for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        }
        sc.close();
        
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] count = new int[26]; count new int[26] 26 while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        } sc.hasNext() sc.hasNext sc {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        } String line = sc.nextLine(); line sc.nextLine() sc.nextLine sc line = line.toLowerCase() line line.toLowerCase() line.toLowerCase line char[] ch = line.toCharArray(); ch line.toCharArray() line.toCharArray line for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            } int i = 0; int i = 0; i 0 i < ch.length i ch.length ch ch.length i++ i++ i {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            } {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            } int n = ch[i] - 'a'; n ch[i] - 'a' ch[i] ch i 'a' if (0 <= n && n <= 25) {
                    count[n]++;
                } 0 <= n && n <= 25 0 <= n 0 n n <= 25 n 25 {
                    count[n]++;
                } count[n]++ count[n] count n for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        } int i = 0; int i = 0; i 0 i < count.length i count.length count count.length i++ i++ i {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        } {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        } char c = (char)(i+'a'); c (char)(i+'a') i 'a' System.out.println(c + " : "+ count[i]) System.out.println System.out System System.out c + " : "+ count[i] c + " : "+ count[i] c " : " count[i] count i sc.close() sc.close sc String[] args args public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int[] count = new int[26];
        while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        }
        for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        }
        sc.close();
        
    }

} public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int[] count = new int[26];
        while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        }
        for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        }
        sc.close();
        
    }

} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int[] count = new int[26];
        while (sc.hasNext()) {
            String line = sc.nextLine();
            line = line.toLowerCase();
            char[] ch = line.toCharArray();
            for (int i = 0; i < ch.length; i++) {
                int n = ch[i] - 'a';
                if (0 <= n && n <= 25) {
                    count[n]++;
                }
            }
        }
        for (int i = 0; i < count.length; i++) {
            char c = (char)(i+'a');
            System.out.println(c + " : "+ count[i]);
        }
        sc.close();
        
    }

}