C11111211113313112113313331333133313331333132313231333133313331312321111   >>    C1111121111331311211331333133313331333133313231323133313331333131232111   <<    C11111211113313112113313331333133313331333132313231333133313331312321113   >>      C11111211113313112113313331333133313331333132313231333133313331312321112   >>