C212212121212113313221323131323131323132322331323132213132313111   >>    C21221212121211331322132313132313132313232233132313221313231311   <<    C212212121212113313221323131323131323132322331323132213132313113   >>      C212212121212113313221323131323131323132322331323132213132313112   >>