duration	next
2	50
1.8	57
3.7	55
2.2	47
2.1	53
2.4	50
2.6	62
2.8	57
3.3	72
3.5	62
3.7	63
3.8	70
4.5	85
4.7	75
4	77
4	70
1.7	43
1.8	48
4.9	70
4.2	79
4.3	72