C11112331312111112111133133313331333133313112113313331333133313231121133132211   >>    C1111233131211111211113313331333133313331311211331333133313331323112113313221   <<    C11112331312111112111133133313331333133313112113313331333133313231121133132213   >>      C11112331312111112111133133313331333133313112113313331333133313231121133132212   >>