C1111233131211111211113313231333133313331323221211113313311211113313222323221   >>    C111123313121111121111331323133313331333132322121111331331121111331322232322   <<    C1111233131211111211113313231333133313331323221211113313311211113313222323223   >>      C1111233131211111211113313231333133313331323221211113313311211113313222323222   >>