#include <stdio.h>

int myMax(int a, int b) {
   if (a > b) { return a;}
   else {return b;}
   
 }


int main() {

 int x,y,z,w;
 int gr;

 scanf("%d%d%d%d", &x,&y,&z,&w);

 gr = myMax(x,y);
 gr = myMax(gr,z);
 gr = myMax(gr,w);

 printf("The largest number is: %d\n",gr);

return 0;
}