| | | | | | | | | 20 | | | | | | | | | | 6 1 | | | | 2019 5 31 | 6 1 | 6 1 | 5 31 | | | | | | | | 20 | | | | | | | | | | | 1932 | | | 1949 | 10 1 | | | | | | | | | | | |