C1111233131211111211113313231333132333132322331323132313232213221   >>    C111123313121111121111331323133313233313232233132313231323221322   <<    C1111233131211111211113313231333132333132322331323132313232213223   >>      C1111233131211111211113313231333132333132322331323132313232213222   >>