C11111211113313112113313331333133313331122112312111133132322321111133313231221   >>    C1111121111331311211331333133313331333112211231211113313232232111113331323122   <<    C11111211113313112113313331333133313331122112312111133132322321111133313231223   >>      C11111211113313112113313331333133313331122112312111133132322321111133313231222   >>