The program has the following output: 1 4 4 6 1 2 2 3 1 6 6 6 5 7 5 4 4 1 4 6 1 2 3 1 6 5 7 5 4 1 4 4 6 1 3 1 6 6 6 4 4 Notethatthesecondcallofunique_copy() doesnotremovetheelementsthatdifferby1fromtheir predecessorbyone. Instead, itremovesall elements thatdifferby 1 fromtheirpreviouselement that is not removed. For example, after the three occurrences of 6, the following 5, 7, and 5 differ by 1 compared with 6, so they are removed. However, the following two occurrences of 4 remain in the sequence because compared with 6, the difference is not 1. Another example compresses sequences of spaces