least-stretched occurrence of "stretch": 8.99 20 20 21 21 21 22 22 23 21 23 21 24 20 27 least-stretched occurrence of "unforgiving": 16.36 21 10 22 10 23 8 23 9 21 5 19 4 18 5 19 5 18 5 18 4 19 4 least-stretched occurrence of "harmony": 6.83 41 41 40 41 39 42 40 43 40 44 40 45 41 45 least-stretched occurrence of "softball": 9.58 46 9 45 10 44 10 43 13 43 14 41 14 41 15 41 15