C1212121231123232233131323223313231333132322131133131323132313221   >>    C121212123112323223313132322331323133313232213113313132313231322   <<    C1212121231123232233131323223313231333132322131133131323132313223   >>      C1212121231123232233131323223313231333132322131133131323132313222   >>