Warning from statistic library!
  Warning code: 202
  Warning message: Frequency value of ngram 'n11' must not exceed the marginal totals.
Skipping ngram one<>two<>13 7 5
Warning from statistic library!
  Warning code: 202
  Warning message: Frequency value of ngram 'n11' must not exceed the marginal totals.
Skipping ngram one<>three<>13 5 5
Warning from statistic library!
  Warning code: 202
  Warning message: Frequency value of ngram 'n11' must not exceed the marginal totals.
Skipping ngram one<>four<>13 5 3
Warning from statistic library!
  Warning code: 202
  Warning message: Frequency value of ngram 'n11' must not exceed the marginal totals.
Skipping ngram two<>two<>3 7 2
Warning from statistic library!
  Warning code: 202
  Warning message: Frequency value of ngram 'n11' must not exceed the marginal totals.
Skipping ngram two<>four<>3 5 1