C212212121212113313221323131323132313132322331323132233133112312321   >>    C21221212121211331322132313132313231313232233132313223313311231232   <<    C212212121212113313221323131323132313132322331323132233133112312323   >>      C212212121212113313221323131323132313132322331323132233133112312322   >>