import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] cnt = new int[26];

        while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] cnt = new int[26];

        while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] cnt = new int[26];

        while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int[] cnt = new int[26];

        while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] cnt = new int[26]; cnt new int[26] 26 while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        } sc.hasNext() sc.hasNext sc {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        } String input = sc.next(); input sc.next() sc.next sc input = input.toLowerCase() input input.toLowerCase() input.toLowerCase input for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            } int i = 0; int i = 0; i 0 i < input.length() i input.length() input.length input i++ i++ i {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            } {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            } for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                } int j = 0; int j = 0; j 0 j < 26 j 26 j++ j++ j {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                } {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                } if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    } (j+'a') == input.charAt(i) (j+'a') j 'a' input.charAt(i) input.charAt input i {
                        cnt[j] += 1;
                    } cnt[j] += 1 cnt[j] cnt j 1 for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        } int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        } {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        } System.out.println((char)('a'+i) + " : " + cnt[i]) System.out.println System.out System System.out (char)('a'+i) + " : " + cnt[i] (char)('a'+i) + " : " + cnt[i] (char)('a'+i) 'a' i " : " cnt[i] cnt i String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] cnt = new int[26];

        while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] cnt = new int[26];

        while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] cnt = new int[26];

        while (sc.hasNext()) {
            String input = sc.next();
            input = input.toLowerCase();
            for (int i = 0; i < input.length(); i++) {
                for (int j = 0; j < 26; j++) {
                    if ((j+'a') == input.charAt(i)) {
                        cnt[j] += 1;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++) {
            System.out.println((char)('a'+i) + " : " + cnt[i]);
        }
    }
}
