Remove All Occurrences of AWS

Given a string consisting of uppercase English letters, remove all occurrences of 'AWS' until none remain. After each removal, concatenate the prefix and suffix strings. Return the final string. If the final string is empty, return '-1' as a string. Input Format A string s of length 1 ≤ |s| ≤ 10^5 The string contains only uppercase English letters. Output Format Return the processed string or '-1'. Example Input: AWAWSSG Output: G Input: AWSSG Output: G Example Input AWAWSSG