Grocery list program options.
  a : add item
  r : remove item
  i : increment quantity
  d : decrement quantity
  p : print list to screen
  x : exit
What item do you want to add? Option (a, r, i, d, p, x): What item do you want to add? Option (a, r, i, d, p, x): What item do you want to add? Option (a, r, i, d, p, x): What item do you want to add? Option (a, r, i, d, p, x): What item do you want to add? Option (a, r, i, d, p, x): What item do you want to increment? Option (a, r, i, d, p, x): What item do you want to increment? Option (a, r, i, d, p, x): 5
carrots 3 2
chips 1 3
soda 1 4
kleenex 1 8
cereal 1 -1
Option (a, r, i, d, p, x): What item do you want to delete? Option (a, r, i, d, p, x): 4
carrots 3 2
chips 1 3
kleenex 1 8
cereal 1 -1
Option (a, r, i, d, p, x): What item do you want to add? Option (a, r, i, d, p, x): Goodbye.