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

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] alphabetList = new int[26];
        String line;
        while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        }
        int n = 0;
        for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        }
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] alphabetList = new int[26];
        String line;
        while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        }
        int n = 0;
        for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        }
    }
} Main public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] alphabetList = new int[26];
        String line;
        while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        }
        int n = 0;
        for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        }
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] alphabetList = new int[26];
        String line;
        while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        }
        int n = 0;
        for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        }
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int[] alphabetList = new int[26]; alphabetList new int[26] 26 String line; line while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        } null != (line = br.readLine()) null (line = br.readLine()) line br.readLine() br.readLine br {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        } for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            } int c line.toCharArray() line.toCharArray line {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            } {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            } c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c c c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c c >= 65 && c <= 90 c >= 65 c 65 c <= 90 c 90 c - 65 c 65 c >= 97 && c <= 122 ? c - 97 : c c >= 97 && c <= 122 c >= 97 c 97 c <= 122 c 122 c - 97 c 97 c if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                } c >= 0 && c <= 26 c >= 0 c 0 c <= 26 c 26 {
                    alphabetList[c]++;
                } alphabetList[c]++ alphabetList[c] alphabetList c int n = 0; n 0 for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        } int i alphabetList {
            System.out.println((char) (++n + 96) + " : " + i);
        } {
            System.out.println((char) (++n + 96) + " : " + i);
        } System.out.println((char) (++n + 96) + " : " + i) System.out.println System.out System System.out (char) (++n + 96) + " : " + i (char) (++n + 96) + " : " + i (char) (++n + 96) ++n n 96 " : " i String[] args args public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] alphabetList = new int[26];
        String line;
        while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        }
        int n = 0;
        for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        }
    }
} public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] alphabetList = new int[26];
        String line;
        while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        }
        int n = 0;
        for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        }
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int[] alphabetList = new int[26];
        String line;
        while (null != (line = br.readLine())) {
            for (int c : line.toCharArray()) {
                c = c >= 65 && c <= 90 ? c - 65 : c >= 97 && c <= 122 ? c - 97 : c;
                if (c >= 0 && c <= 26) {
                    alphabetList[c]++;
                }
            }
        }
        int n = 0;
        for (int i : alphabetList) {
            System.out.println((char) (++n + 96) + " : " + i);
        }
    }
}