hauteur	foret
23.4	1
24.4	1
24.6	1
24.9	1
25	1
26.2	1
22.5	2
22.9	2
23.7	2
24.0	2
24.4	2
18.9	3
21.1	3
21.2	3
22.1	3
22.5	3
23.5	3
24.5	3