C1111233131211111211113313231333133313331323221211111333133313221   >>    C111123313121111121111331323133313331333132322121111133313331322   <<    C1111233131211111211113313231333133313331323221211111333133313223   >>      C1111233131211111211113313231333133313331323221211111333133313222   >>