C11111211113313112113313331333133313331333132313331333132233133313231323233221   >>    C1111121111331311211331333133313331333133313231333133313223313331323132323322   <<    C11111211113313112113313331333133313331333132313331333132233133313231323233223   >>      C11111211113313112113313331333133313331333132313331333132233133313231323233222   >>