50
1 1 1000 3 3 1000 5 5 1000 7 7 1000 9 9 1000 11 11 1000 13 13 1000 15 15 1000 17 17 1000 19 19 1000 21 21 1000 23 23 1000 25 25 1000 27 27 1000 29 29 1000 31 31 1000 33 33 
1 1000 1 3 1000 3 5 1000 5 7 1000 7 9 1000 9 11 1000 11 13 1000 13 15 1000 15 17 1000 17 19 1000 19 21 1000 21 23 1000 23 25 1000 25 27 1000 27 29 1000 29 31 1000 31 33 1000 
2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1