C11112331312111112111133133313231333133313311211331323133313221   >>    C1111233131211111211113313331323133313331331121133132313331322   <<    C11112331312111112111133133313231333133313311211331323133313223   >>      C11112331312111112111133133313231333133313311211331323133313222   >>