import java.util.Scanner;

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

        int[] cnt = new int[200];

        while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        }

        for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        }


    }
} 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[200];

        while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        }

        for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        }


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

        int[] cnt = new int[200];

        while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        }

        for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        }


    } main {
        Scanner sc = new Scanner(System.in);

        int[] cnt = new int[200];

        while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        }

        for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        }


    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] cnt = new int[200]; cnt new int[200] 200 while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        } sc.hasNext() sc.hasNext sc {
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        } String str = sc.next().toLowerCase(); str sc.next().toLowerCase() sc.next().toLowerCase sc.next() sc.next sc for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            } int i=0; int i=0; i 0 i<str.length() i str.length() str.length str i++ i++ i {
                cnt[str.charAt(i)]++;
            } {
                cnt[str.charAt(i)]++;
            } cnt[str.charAt(i)]++ cnt[str.charAt(i)] cnt str.charAt(i) str.charAt str i for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        } char ch='a'; char ch='a'; ch 'a' ch<='z' ch 'z' ch++ ch++ ch {
            System.out.println(ch+" : "+cnt[ch]);
        } {
            System.out.println(ch+" : "+cnt[ch]);
        } System.out.println(ch+" : "+cnt[ch]) System.out.println System.out System System.out ch+" : "+cnt[ch] ch+" : "+cnt[ch] ch " : " cnt[ch] cnt ch String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int[] cnt = new int[200];

        while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        }

        for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        }


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

        int[] cnt = new int[200];

        while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        }

        for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        }


    }
} Main
import java.util.Scanner;

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

        int[] cnt = new int[200];

        while(sc.hasNext()){
            String str = sc.next().toLowerCase();
            for(int i=0;i<str.length();i++){
                cnt[str.charAt(i)]++;
            }
        }

        for(char ch='a';ch<='z';ch++){
            System.out.println(ch+" : "+cnt[ch]);
        }


    }
}
