nextMyStates::MyState->[MyState]

[Omar-Nour]

The function takes as input a state and returns the set of states resulting from
applying up, down, left, right, and collect from the input state. The output set
of states should not contain any Null states.
2
Example:
nextMyStates (S (3,0) [(2,2),(1,2)] "" Null) =
[(S (2,0) [(2,2),(1,2)] "up" (S (3,0) [(2,2),(1,2)] "" Null)),
S (3,1) [(2,2),(1,2)] "right" (S (3,0) [(2,2),(1,2)] "" Null) ]