import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] counts = new int[26];

        while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        }

        for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        }
    }

    private static boolean isUppercase(char c) {
        return (c >= 'A' && c <= 'Z');
    }

    private static boolean isLowercase(char c) {
        return (c >= 'a' && c <= 'z');
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] counts = new int[26];

        while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        }

        for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        }
    }

    private static boolean isUppercase(char c) {
        return (c >= 'A' && c <= 'Z');
    }

    private static boolean isLowercase(char c) {
        return (c >= 'a' && c <= 'z');
    }
} Main public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] counts = new int[26];

        while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        }

        for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        }
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] counts = new int[26];

        while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        }

        for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        }
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int[] counts = new int[26]; counts new int[26] 26 while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        } true {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        } String line = br.readLine(); line br.readLine() br.readLine br if (line == null) {
                break;
            } line == null line null {
                break;
            } break; for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            } int i = 0; int i = 0; i 0 i < line.length() i line.length() line.length line i++ i++ i {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            } {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            } char c = line.charAt(i); c line.charAt(i) line.charAt line i if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                } isUppercase(c) isUppercase c {
                    counts[c - 'A']++;
                } counts[c - 'A']++ counts[c - 'A'] counts c - 'A' c 'A' if (isLowercase(c)) {
                    counts[c - 'a']++;
                } isLowercase(c) isLowercase c {
                    counts[c - 'a']++;
                } counts[c - 'a']++ counts[c - 'a'] counts c - 'a' c 'a' for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        } int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        } {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        } System.out.println((char) (i + 'a') + " : " + counts[i]) System.out.println System.out System System.out (char) (i + 'a') + " : " + counts[i] (char) (i + 'a') + " : " + counts[i] (char) (i + 'a') i 'a' " : " counts[i] counts i String[] args args private static boolean isUppercase(char c) {
        return (c >= 'A' && c <= 'Z');
    } isUppercase {
        return (c >= 'A' && c <= 'Z');
    } return (c >= 'A' && c <= 'Z'); (c >= 'A' && c <= 'Z') c >= 'A' c 'A' c <= 'Z' c 'Z' char c c private static boolean isLowercase(char c) {
        return (c >= 'a' && c <= 'z');
    } isLowercase {
        return (c >= 'a' && c <= 'z');
    } return (c >= 'a' && c <= 'z'); (c >= 'a' && c <= 'z') c >= 'a' c 'a' c <= 'z' c 'z' char c c public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] counts = new int[26];

        while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        }

        for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        }
    }

    private static boolean isUppercase(char c) {
        return (c >= 'A' && c <= 'Z');
    }

    private static boolean isLowercase(char c) {
        return (c >= 'a' && c <= 'z');
    }
} public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] counts = new int[26];

        while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        }

        for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        }
    }

    private static boolean isUppercase(char c) {
        return (c >= 'A' && c <= 'Z');
    }

    private static boolean isLowercase(char c) {
        return (c >= 'a' && c <= 'z');
    }
} Main
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] counts = new int[26];

        while (true) {
            String line = br.readLine();

            if (line == null) {
                break;
            }

            for (int i = 0; i < line.length(); i++) {
                char c = line.charAt(i);
                if (isUppercase(c)) {
                    counts[c - 'A']++;
                } else if (isLowercase(c)) {
                    counts[c - 'a']++;
                }
            }
        }

        for (int i = 0; i < 26; i++) {
            System.out.println((char) (i + 'a') + " : " + counts[i]);
        }
    }

    private static boolean isUppercase(char c) {
        return (c >= 'A' && c <= 'Z');
    }

    private static boolean isLowercase(char c) {
        return (c >= 'a' && c <= 'z');
    }
}