public class TestFour {

    public static void main(String[] args){

        int[] array={1,2,3,4};

        int i,j,k,num = 0;

        for(i=0;i<4;i++){

            for(j=0;j<4;j++){

                if(i==j){

                    continue;

                }

                for(k=0;k<4;k++){

                    if(k==i||k==j){

                    continue;

                    }

                    System.out.println(array[i]*100+array[j]*10+array[k]*1);

                    num++;

                }

            }

        }

        System.out.println(num);

    }

}