C11112331312111112111133132313331333133313232212111112113313231221   >>    C1111233131211111211113313231333133313331323221211111211331323122   <<    C11112331312111112111133132313331333133313232212111112113313231223   >>      C11112331312111112111133132313331333133313232212111112113313231222   >>