import java.util.Scanner;

public class NewClass {

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

        int N[]=new int[3];
        System.out.print("IT:");
        N[0]=sc.nextInt();

        System.out.print("SE:");
        N[1]=sc.nextInt();

        System.out.print("IT:");
        N[2]=sc.nextInt();

        for(int i=0;i<N.length;i++)
        {
            int c=0;
            for (int j = 0; j < N[i]; j++) {
                System.out.print("X");
                c++;
            }
            System.out.print(" "+c+"\n");
        }
    }
}