Given a sentence with numbers representing a word's location embedded within each word, return the sorted sentence.
rearrange("is2 Thi1s T4est 3a") ➞ "This is a Test"
rearrange("4of Fo1r pe6ople g3ood th5e the2") ➞ "For the good of the people"
rearrange(" ") ➞ " "
Only the integers 1-9 will be used.