C1111233131211111211113313331333133313231313331311331323132212221   >>    C111123313121111121111331333133313331323131333131133132313221222   <<    C1111233131211111211113313331333133313231313331311331323132212223   >>      C1111233131211111211113313331333133313231313331311331323132212222   >>