Possible or impossible

-18 1i 18 1i 3l 1i 5f 1k,-18 1h -6d 1i -6b -20 3b -1t,3c -1t 3g q 53 1a,54 1a 5b 1a 5k 19 5i 1j 5f 1j,8p 2i bo 7n av d9 69 gf,69 gd -p fs##T 74 ce,B -5d 18 28,B -5j 19 2l,B -5v 18 30,B -61 12 2q,B -5o v 2q,B 26 t 2q,B 2d q 2q,B 2c t 2q,B 2l 12 2l,B 1v 10 2u,B 1s v 36,T 5h 1c