1 13 14 | | | 14 | 4✕200 2000 | 2 | 4✕1000 | | 4✕1500 2 | 4✕1000 | | 4✕200 | 2000 | | 4✕1500 | 4✕1000 4 | 20 | | 8 12 | | | 21 | | |