Pattern Matching in a Sentence

You are given a sentence and a word. Your task is to count how many times the word appears in the sentence and return the positions of those appearances (0-based index). If the word does not appear, return -1. The inputs will be provided as a single line where the first part is the sentence followed by the word, separated by a comma. Example Input: This is a test sentence, test Example Output: 2 0,10