#include<stdio.h>
int main()
{
    int a,b, total_mass;
    scanf ("%d",&a);
    scanf ("%d",&b);
    total_mass=a+b;
    printf ("%1 rectant",&a);
    printf ("% 2 reactant",&b);
    printf ("% total_mass",&total_mass);
    if (a<=0)
    {
        printf (" invalid input");
    }
    else
    {
        printf (" the total_mass is:",total_mass);
    }
    return 0;
}