#include<stdio.h>

int main(void){
  int i;
  char C[8];
  int n = 0, max = 0;
  scanf("%s", C);
  for(i = 0; C[i] != '\0'; i++){
    if(C[i] == 'o'){
      n++;
      if(max < n) max = n;
    }
    else n = 0;
  }
  scanf("%s", C);
  for(i = 0; C[i] != '\0'; i++){
    if(C[i] == 'o'){
      n++;
      if(max < n) max = n;
    }
    else n = 0;
  }
  printf("%d\n", max);
  return 0;
}