C1212121231123232233131323223313231333132333132322331322132313231   >>    C121212123112323223313132322331323133313233313232233132213231323   <<    C1212121231123232233131323223313231333132333132322331322132313233   >>      C1212121231123232233131323223313231333132333132322331322132313232   >>