C1111233131211111211113313331333133313232212111133132311233132221   >>    C111123313121111121111331333133313331323221211113313231123313222   <<    C1111233131211111211113313331333133313232212111133132311233132223   >>      C1111233131211111211113313331333133313232212111133132311233132222   >>