C11111211113313112113313331333133313331333132313331333132223213221   >>    C1111121111331311211331333133313331333133313231333133313222321322   <<    C11111211113313112113313331333133313331333132313331333132223213223   >>      C11111211113313112113313331333133313331333132313331333132223213222   >>