#include <string>
#include <deque>
#include <cstdint>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <map>
#include <set>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

int main(int argc, char **argv) 
{
  string p, file, s;
  int i;

  if (argc != 2) {
    fprintf(stderr, "usage: p < f\n");
    exit(1);
  }

  while (getline(cin, s)) {
    if (file.size() != 0) file += " ";
    file += s;
  }
  
  p = argv[1];

  for (i = 0; i + p.size() <= file.size(); i++) {
    if (strncmp(p.c_str(), file.c_str()+i, p.size()) == 0) {
      printf("%d\n", i);
      return 0;
    }
  }
  printf("Not found.\n");
  return 0;
}