K1*4,5,K1*4,4,K2,2,4和K2,2,5不是U3LC图
K1*4,5,K1*4,4,K2,2,4화K2,2,5불시U3LC도
g1*4,5, g1 *4,4 ,g2,2,4and g2,2,5 are not U3LC graph
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