import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str;
        String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
        int[] count = new int[26];
        while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        }
        for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str;
        String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
        int[] count = new int[26];
        while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        }
        for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str;
        String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
        int[] count = new int[26];
        while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        }
        for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String str;
        String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
        int[] count = new int[26];
        while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        }
        for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str; str String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"}; alfa {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"} "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s" "t" "u" "v" "w" "x" "y" "z" int[] count = new int[26]; count new int[26] 26 while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        } sc.hasNext() sc.hasNext sc {
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        } str = sc.nextLine() str sc.nextLine() sc.nextLine sc String[] s = new String[str.length()]; s new String[str.length()] str.length() str.length str for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            } int i=0; int i=0; i 0 i<str.length() i str.length() str.length str i++ i++ i {
                s[i] = String.valueOf(str.charAt(i));
            } {
                s[i] = String.valueOf(str.charAt(i));
            } s[i] = String.valueOf(str.charAt(i)) s[i] s i String.valueOf(str.charAt(i)) String.valueOf String str.charAt(i) str.charAt str i for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            } int i=0; int i=0; i 0 i<str.length() i str.length() str.length str i++ i++ i {
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            } {
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            } for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                } int j=0; int j=0; j 0 j<26 j 26 j++ j++ j {
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                } {
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                } if(s[i].equalsIgnoreCase(alfa[j])) count[j]++; s[i].equalsIgnoreCase(alfa[j]) s[i].equalsIgnoreCase s[i] s i alfa[j] alfa j count[j]++ count[j] count j for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        } int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
            System.out.println(alfa[i] + " : " +count[i]);
        } {
            System.out.println(alfa[i] + " : " +count[i]);
        } System.out.println(alfa[i] + " : " +count[i]) System.out.println System.out System System.out alfa[i] + " : " +count[i] alfa[i] + " : " +count[i] alfa[i] alfa i " : " count[i] count i String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str;
        String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
        int[] count = new int[26];
        while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        }
        for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        }
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str;
        String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
        int[] count = new int[26];
        while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        }
        for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        }
    }
} Main
import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str;
        String[] alfa = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
        int[] count = new int[26];
        while(sc.hasNext()){
            str = sc.nextLine();
            String[] s = new String[str.length()];
            for(int i=0;i<str.length();i++){
                s[i] = String.valueOf(str.charAt(i));
            }
            for(int i=0;i<str.length();i++){
                for(int j=0;j<26;j++){
                    if(s[i].equalsIgnoreCase(alfa[j])) count[j]++;
                }
            }
        }
        for(int i=0;i<26;i++){
            System.out.println(alfa[i] + " : " +count[i]);
        }
    }
}
