C1111233133313231133133313331333132313232212121111331323113313221   >>    C111123313331323113313331333133313231323221212111133132311331322   <<    C1111233133313231133133313331333132313232212121111331323113313223   >>      C1111233133313231133133313331333132313232212121111331323113313222   >>