MAYBE . R . T U . . R T U . R id R . id R R and id id id sub id id id . and R T and U V and . R U . T V . sub R T sub U V sub . U R . T V . and R T w1 . w1 R . and R T w2 . w2 T . R c . c and R R . c w1 id . c w2 id . R i . i sub id and R id . and . i sub id R T e . and id T R . . W and R T and U V . W and . R U . T V . . W sub R T sub U V . W sub . U R . T V . . W and R T w1 . . W w1 R . . W and R T w2 . . W w2 T . and i R e and id R . . W and i R e . W and id R . . W and . i sub id R T e . . W and id T R 2.1 ACP 0.72