!7

p {
  assertFalse(isProperFileName(""));
  assertFalse(isProperFileName("."));
  assertFalse(isProperFileName(".."));
  assertFalse(isProperFileName("/"));
  assertFalse(isProperFileName("a/"));
  assertFalse(isProperFileName(".a"));
  assertTrue(isProperFileName("a."));
  assertFalse(isProperFileName("c:"));
  assertFalse(isProperFileName("\\"));
  assertTrue(isProperFileName("webs-made.txt.part1.gz"));
  assertTrue(isProperFileName("CAPITAL"));
  print("OK");
}