Return true if the string in the first element of the array contains all of the letters of the string in the second element of the array.
["hello", "Hello"], should return true because all of the letters in the second string are present in the first, ignoring case.
["hello", "hey"] should return false because the string "hello" does not contain a "y".
["Alien", "line"], should return true because all of the letters in "line" are present in "Alien".
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