C1111233131211111211113313231333133313331323221211113313311211331333221221   >>    C111123313121111121111331323133313331333132322121111331331121133133322122   <<    C1111233131211111211113313231333133313331323221211113313311211331333221223   >>      C1111233131211111211113313231333133313331323221211113313311211331333221222   >>