35
The trigrams
The trigrams are combinations of three yin and yang lines. The three bottom lines of the hexagram form the lower trigram and represent the inner situation. The three top lines form the upper trigram and represent the outer situation.
Upper trigram: The fire

Lower trigram: The earth

The nuclear hexagram: 39
The nuclear hexagram is the association of the two inner trigrams (lines 2,3,4 and 3,4,5). It represents the root, or the origin of the situation.
39 - Uncertainty
Solving a difficulty requires a patient study. If one fails, one will receive help after showing that one has done one's best.
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