import java.util.*;
import java.text.*;

class Main {
    public static void main(String[]args)throws Exception {
        Scanner sc = new Scanner(System.in);
        int [] cnt = new int[26];
        while(sc.hasNext()) {
            char [] cs = sc.nextLine().toCharArray();
            for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            }
        }
        for(int i = 0; i < 26; i++) {
            System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]);
        }
    }
} import java.util.*; util.* java import java.text.*; text.* java class Main {
    public static void main(String[]args)throws Exception {
        Scanner sc = new Scanner(System.in);
        int [] cnt = new int[26];
        while(sc.hasNext()) {
            char [] cs = sc.nextLine().toCharArray();
            for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            }
        }
        for(int i = 0; i < 26; i++) {
            System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]);
        }
    }
} Main public static void main(String[]args)throws Exception {
        Scanner sc = new Scanner(System.in);
        int [] cnt = new int[26];
        while(sc.hasNext()) {
            char [] cs = sc.nextLine().toCharArray();
            for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            }
        }
        for(int i = 0; i < 26; i++) {
            System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int [] cnt = new int[26];
        while(sc.hasNext()) {
            char [] cs = sc.nextLine().toCharArray();
            for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            }
        }
        for(int i = 0; i < 26; i++) {
            System.out.println("" + ((char)(i+'a')) + " : " + 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()) {
            char [] cs = sc.nextLine().toCharArray();
            for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            }
        } sc.hasNext() sc.hasNext sc {
            char [] cs = sc.nextLine().toCharArray();
            for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            }
        } char [] cs = sc.nextLine().toCharArray(); cs sc.nextLine().toCharArray() sc.nextLine().toCharArray sc.nextLine() sc.nextLine sc for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            } int i = 0; int i = 0; i 0 i < cs.length i cs.length cs cs.length i++ i++ i {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            } {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            } if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                } cs[i] >= 'A' && cs[i] <= 'Z' cs[i] >= 'A' cs[i] cs i 'A' cs[i] <= 'Z' cs[i] cs i 'Z' {
                    cnt[cs[i]-'A']++;
                } cnt[cs[i]-'A']++ cnt[cs[i]-'A'] cnt cs[i]-'A' cs[i] cs i 'A' if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                } cs[i] >= 'a' && cs[i] <= 'z' cs[i] >= 'a' cs[i] cs i 'a' cs[i] <= 'z' cs[i] cs i 'z' {
                    cnt[cs[i]-'a']++;
                } cnt[cs[i]-'a']++ cnt[cs[i]-'a'] cnt cs[i]-'a' cs[i] cs i 'a' for(int i = 0; i < 26; i++) {
            System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]);
        } int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
            System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]);
        } {
            System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]);
        } System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]) System.out.println System.out System System.out "" + ((char)(i+'a')) + " : " + cnt[i] " : " "" + ((char)(i+'a')) + " : " + cnt[i] "" ((char)(i+'a')) i 'a' " : " cnt[i] cnt i String[]args args
import java.util.*;
import java.text.*;

class Main {
    public static void main(String[]args)throws Exception {
        Scanner sc = new Scanner(System.in);
        int [] cnt = new int[26];
        while(sc.hasNext()) {
            char [] cs = sc.nextLine().toCharArray();
            for(int i = 0; i < cs.length; i++) {
                if(cs[i] >= 'A' && cs[i] <= 'Z') {
                    cnt[cs[i]-'A']++;
                }
                if(cs[i] >= 'a' && cs[i] <= 'z') {
                    cnt[cs[i]-'a']++;
                }
            }
        }
        for(int i = 0; i < 26; i++) {
            System.out.println("" + ((char)(i+'a')) + " : " + cnt[i]);
        }
    }
}