tab@music3:/../Perlmongers$ perl -w 1056774-2.pl
  foobar => 72
  foobarX => 9
  foobarXa => 9
  foobarXab => 9
  foobarXabc => 9
  foobarXac => 9
  foobarXb => 9
  foobarXbc => 9
  foobarXc => 9
  foobara => 8
  foobarab => 8
  foobarabc => 8
  foobarac => 8
  foobarb => 8
  foobarbc => 8
  foobarc => 8
  foobaraX => 1
  foobaraXa => 1
  foobaraXab => 1
  foobaraXabc => 1
  foobaraXac => 1
  foobaraXb => 1
  foobaraXbc => 1
  foobaraXc => 1
  foobarabX => 1
  foobarabXa => 1
  foobarabXab => 1
  foobarabXabc => 1
  foobarabXac => 1
  foobarabXb => 1
  foobarabXbc => 1
  foobarabXc => 1
  foobarabcX => 1
  foobarabcXa => 1
  foobarabcXab => 1
  foobarabcXabc => 1
  foobarabcXac => 1
  foobarabcXb => 1
  foobarabcXbc => 1
  foobarabcXc => 1
  foobaracX => 1
  foobaracXa => 1
  foobaracXab => 1
  foobaracXabc => 1
  foobaracXac => 1
  foobaracXb => 1
  foobaracXbc => 1
  foobaracXc => 1
  foobarbX => 1
  foobarbXa => 1
  foobarbXab => 1
  foobarbXabc => 1
  foobarbXac => 1
  foobarbXb => 1
  foobarbXbc => 1
  foobarbXc => 1
  foobarbcX => 1
  foobarbcXa => 1
  foobarbcXab => 1
  foobarbcXabc => 1
  foobarbcXac => 1
  foobarbcXb => 1
  foobarbcXbc => 1
  foobarbcXc => 1
  foobarcX => 1
  foobarcXa => 1
  foobarcXab => 1
  foobarcXabc => 1
  foobarcXac => 1
  foobarcXb => 1
  foobarcXbc => 1
  foobarcXc => 1
tab@music3:/../Perlmongers$