| 1 | it might lead to a permanently warped personality. | |
| 2 | Try to keep your sense of humor and let it triumph over grumpiness. | |
| 3 | Years of living alone may warp one's personality. | |
| 4 | Between sour and elderly people friendship arises less readily. | |
| 5 | The researchers offer two hypotheses for this rise in grumpiness. |
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