#define MAX  32535u
#include <stdio.h>

unsigned int m, n, zeile, platz, act;
unsigned int pasc[MAX][2];
FILE *input;

void pascaldr(unsigned int actzeile, bool arr)
{
  if (actzeile > zeile) return;
  int act = (arr)?1:0;
  int prev = (!arr)?1:0;
  pasc[0][act]=1;//printf("1 ");
  for (unsigned int i = 1; i <= actzeile; i++)
    {pasc[i][act] = pasc[i-1][prev] + pasc[i][prev]; }//printf("%i ",pasc[i][act]);}
  //printf("\n");
  pascaldr(actzeile+1,!arr);
}


int main(void)
{
  input = fopen("grid.in","r");
  fscanf(input,"%d %d\n", &n, &m);
  while(n!=0 && m!=0)
  {
    if(n==0 || m==0)
    {
      printf("0\n");
      continue;
    }
    zeile = n+m;
    platz = (n < m) ? n : m; //Min
    act = (zeile+1)%2;
    pasc[0][0] = 1;pasc[1][0]=1;
    pascaldr(2,1);
    printf("%i\n", pasc[platz][act]);
    fscanf(input,"%d %d\n", &n, &m);
  }
  fclose(input);
  return 0;
}