C212212121213232233131313231323223313232233132222331323221211321   >>    C21221212121323223313131323132322331323223313222233132322121132   <<    C212212121213232233131313231323223313232233132222331323221211323   >>      C212212121213232233131313231323223313232233132222331323221211322   >>