import java.util.*;

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

        char alpha;
        int[] alpha_num = new int[26];
        String str ="";

        while(sc.hasNext()){
            str += sc.nextLine();
        }

            for(int i = 0;i < str.length();i++){
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            }

            for(int i = 0;i < 26;i++){
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            }
        
    }
} import java.util.*; util.* java class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        char alpha;
        int[] alpha_num = new int[26];
        String str ="";

        while(sc.hasNext()){
            str += sc.nextLine();
        }

            for(int i = 0;i < str.length();i++){
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            }

            for(int i = 0;i < 26;i++){
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            }
        
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        char alpha;
        int[] alpha_num = new int[26];
        String str ="";

        while(sc.hasNext()){
            str += sc.nextLine();
        }

            for(int i = 0;i < str.length();i++){
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            }

            for(int i = 0;i < 26;i++){
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            }
        
    } main {
        Scanner sc = new Scanner(System.in);

        char alpha;
        int[] alpha_num = new int[26];
        String str ="";

        while(sc.hasNext()){
            str += sc.nextLine();
        }

            for(int i = 0;i < str.length();i++){
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            }

            for(int i = 0;i < 26;i++){
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            }
        
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) char alpha; alpha int[] alpha_num = new int[26]; alpha_num new int[26] 26 String str =""; str "" while(sc.hasNext()){
            str += sc.nextLine();
        } sc.hasNext() sc.hasNext sc {
            str += sc.nextLine();
        } str += sc.nextLine() str sc.nextLine() sc.nextLine sc for(int i = 0;i < str.length();i++){
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            } int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str i++ i++ i {
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            } {
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            } alpha = str.charAt(i) alpha str.charAt(i) str.charAt str i for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                } int j = 0; int j = 0; j 0 j < 26 j 26 j++ j++ j {
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                } {
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                } if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1; alpha == (65 + j) || alpha == (97 + j) alpha == (65 + j) alpha (65 + j) 65 j alpha == (97 + j) alpha (97 + j) 97 j alpha_num[j] += 1 alpha_num[j] alpha_num j 1 for(int i = 0;i < 26;i++){
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            } int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            } {
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            } System.out.println((char)(97 + i)+" : "+alpha_num[i]) System.out.println System.out System System.out (char)(97 + i)+" : "+alpha_num[i] (char)(97 + i)+" : "+alpha_num[i] (char)(97 + i) 97 i " : " alpha_num[i] alpha_num i String[] args args
import java.util.*;

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

        char alpha;
        int[] alpha_num = new int[26];
        String str ="";

        while(sc.hasNext()){
            str += sc.nextLine();
        }

            for(int i = 0;i < str.length();i++){
                alpha = str.charAt(i);
                for(int j = 0;j < 26;j++){
                    if(alpha == (65 + j) || alpha == (97 + j))  alpha_num[j] += 1;
                }
            }

            for(int i = 0;i < 26;i++){
                System.out.println((char)(97 + i)+" : "+alpha_num[i]);
            }
        
    }
}
