C11112331333132311331333133112111133132313232233312111113331311213111   >>    C1111233133313231133133313311211113313231323223331211111333131121311   <<    C11112331333132311331333133112111133132313232233312111113331311213113   >>      C11112331333132311331333133112111133132313232233312111113331311213112   >>