Give Me a Hint

Given a sentence, return a list of strings which gradually reveals the next letter in every word at the same time. Use underscores to hide the remaining letters.

Examples

grant_the_hint("Mary Queen of Scots") ➞ [
  "____ _____ __ _____",
  "M___ Q____ o_ S____",
  "Ma__ Qu___ of Sc___",
  "Mar_ Que__ of Sco__",
  "Mary Quee_ of Scot_",
  "Mary Queen of Scots"
]

grant_the_hint("The Life of Pi") ➞ [
  "___ ____ __ __",
  "T__ L___ o_ P_",
  "Th_ Li__ of Pi",
  "The Lif_ of Pi",
  "The Life of Pi"
]

Notes

Maintain capitalisation.