#!python
 
import sys
import re
 
class DelGrep:
    def __init__(self, pat, n):
        self.pat = pat
        self.n = n
 
    def run(self, inp, outp):
        self.buf = ["NOPRINT\n"] * self.n
        self.no_print_count = self.n
 
        for line in inp:
            if re.search(self.pat, line):
                self.no_print_count = self.n * 2 + 1
 
            self.buf.append(line)
            self._write(outp, self.buf.pop(0))
 
        for line in self.buf:
            self._write(outp, line)
 
    def _write(self, outp, line):
        if self.no_print_count > 0:
            self.no_print_count -= 1
            return
 
        outp.write(line)
 
 
if __name__ == '__main__':
    # dg = DelGrep(sys.argv[0], int(sys.argv[1]))
    dg = DelGrep("^10$", 3)
    dg.run(sys.stdin, sys.stdout)
 

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