user
Instruction
Answer the question based on the provided table.


Table
Table Title: Hawaii Islanders
Table Content:
| Year | Record | Finish | Manager | Playoffs |
| --- | --- | --- | --- | --- |
| 1961 | 68-86 | 6th | Tommy Heath / Bill Werle | none |
| 1962 | 77-76 | 5th | Irv Noren | none |
| 1963 | 81-77 | 4th | Irv Noren |  |
| 1964 | 60-98 | 10th | Bob Lemon |  |
| 1965 | 75-72 | 6th (t) | George Case |  |
| 1966 | 63-84 | 10th | George Case |  |
| 1967 | 60-87 | 12th | Wayne Terwilliger |  |
| 1968 | 78-69 | 3rd | Bill Adair |  |
| 1969 | 74-72 | 4th | Chuck Tanner |  |
| 1970 | 98-48 | 1st | Chuck Tanner | Lost League Finals |
| 1971 | 73-73 | 4th (t) | Bill Adair |  |
| 1972 | 74-74 | 5th | Rocky Bridges |  |
| 1973 | 70-74 | 5th | Rocky Bridges / Warren Hacker / Roy Hartsfield |  |
| 1974 | 67-77 | 6th | Roy Hartsfield |  |
| 1975 | 88-56 | 1st | Roy Hartsfield | League Champs |
| 1976 | 77-68 | 2nd | Roy Hartsfield | League Champs |
| 1977 | 79-67 | 2nd | Dick Phillips | Lost League Finals |
| 1978 | 56-82 | 8th | Dick Phillips |  |
| 1979 | 72-76 | 8th | Dick Phillips | Lost League Finals |
| 1980 | 76-65 | 5th | Doug Rader | Lost League Finals |
| 1981 | 72-65 | 3rd (t) | Doug Rader | Lost in 1st round |
| 1982 | 73-71 | 5th | Doug Rader |  |
| 1983 | 72-71 | 5th | Tom Trebelhorn |  |
| 1984 | 87-53 | 1st | Tommy Sandt | Lost League Finals |
| 1985 | 84-59 | 1st | Tommy Sandt | Lost in 1st round |
| 1986 | 65-79 | 9th | Tommy Sandt |  |
| 1987 | 65-75 | 9th | Bob Bailey |  |


Question
who had consecutive league champs?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["Roy Hartsfield"]