I have these BNF rules can someone give me a user input that would be acceptable for these rules? P ::= S S ::= V:=E | read(V) | write(V) | while (C) do S od | O | S;S C ::= E < E | E > E | E = E | E != E | E = E E ::= T | E + T | E - T T ::= F | T * F | T / F F ::= (E) | O | N | V O ::= V++ | V-- | ++V | --V V ::= a | b | | y | z | aV | bV | | yV | zV N ::= 0 | 1 | | 8 | 9 | 0N | 1N | | 8N | 9N.