____ ___ ___ | 24 | | | | -------------------------------------------------------- | | ____ ____ ___ ____ ___ ___ | 15 | 20 | | | 33 | | | | | -------------------------------------------- ----------------------- | | | | | ____ ____ ___ ____ ____ ___ ____ ____ ___ ____ ____ ___ ____ ____ ___ | 10 | 12 | | <=> | 15 | 18 | | <=> | 20 | 21 | | <=> | 30 | 31 | | <=> | 34 | 38 | |
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