C11112331312111112111133133313231333132313331333112113313223123221   >>    C1111233131211111211113313331323133313231333133311211331322312322   <<    C11112331312111112111133133313231333132313331333112113313223123223   >>      C11112331312111112111133133313231333132313331333112113313223123222   >>