C111221232313231313231313231323223313132323132313331323233231323132322311   >>    C11122123231323131323131323132322331313232313231333132323323132313232231   <<    C111221232313231313231313231323223313132323132313331323233231323132322313   >>      C111221232313231313231313231323223313132323132313331323233231323132322312   >>