1880. Check if Word Equals Summation of Two Words

The letter value of a letter is its position in the alphabet starting from 0 (i.e. 'a' -> 0, 'b' -> 1, 'c' -> 2, etc.). The numerical value of some string of lowercase English letters s is the concatenation of the letter values of each letter in s, which is then converted into an integer. - For example, if s = "acb", we concatenate each letter's letter value, resulting in "021". After converting