#include <cstdio>
#include <cstdint>
#include <set>

int main() {
  intmax_t x, y, z;
  char c;
  scanf("3%jd%c%jd %jd", &x, &c, &y, &z);

  if (c == ' ') return puts("\"assert\""), 0;
  std::set<intmax_t> s{x+y, y+z, z+x};
  printf("%jd\n", *++s.rbegin());
}