import java.util.Scanner;

public class FrequencyOfCharacters {

static void frequency(char c[]){

System.out.println("Calculating frequency of characters: ");

boolean visited[]= new boolean[c.length];

for(int i=0; i<c.length; i++){

if (visited[i]== false){

int count= 1;

for(int j=i+1; j<c.length; j++){

if(c[i]==c[j]){

visited[j]= true;

count++;

}

}

System.out.println(c[i] + " - " + count );

}

}

}

public static void main(String[] args) {

Scanner sc= new Scanner(System.in);

//STRING INPUT

System.out.print("Enter a string: ");

String s= sc.nextLine();

//CONVERT THE STRING TO CHAR ARRAY

char c[]= s.toCharArray();

frequency(c);

}

}