Find the location of each word as a list of coordinates. Resulting list can be in any order, but coordinates for individual words must be given in order. Letters cannot be reused across words, and letters. Each given word is guaranteed to be in the grid. Consecutive letters of words are either down or to the right (i.e no reversed words).

For example, given the following grid and set of words,

 [
    ['d', 'r', 'd', 'o', 'r', 's'],
    ['o', 'b', 'i', 'g', 'n', 'c'],
    ['g', 'f', 'n', 'm', 't', 'a'],
    ['x', 's', 'i', 'a', 'n', 't']
]

words1 = [ "dog", "dogma", "cat" ]

output the list of coordinates below:

findWords(grid, words)->
  [ [ (1, 5), (2, 5), (3, 5) ], # cat
    [ (0, 2), (0, 3), (1, 3), (2, 3), (3, 3)], # dogma
    [ (0, 0), (1, 0), (2, 0) ], # dog
  ]

In this example, the "dog" in "dogma" cannot be used for the word "dog" since letters cannot be reused.