--- Stack (Before concating) ---
008: "dog "
007: "lazy "
006: "the "
005: "over "
004: "jumped "
003: "fox "
002: "brown "
001: "quick "
000: "the "
--- Stack (Before sorting) ---
000: "the quick brown fox jumped over the lazy dog "
--- Stack (After sorting) ---
000: "         abcddeeeefghhijklmnoooopqrrttuuvwxyz"