hauteur	foret
23.4	1
24.4	1
24.6	1
24.9	1
25	1
26.2	1
26.3	1
26.8	1
26.8	1
26.9	1
27	1
27.9	1
27.7	1
22.5	2
22.9	2
23.7	2
24.0	2
24.4	2
24.5	2
25.3	2
26.0	2
26.2	2
26.4	2
26.7	2
26.9	2
27.4	2
28.5	2
18.9	3
21.1	3
21.2	3
22.1	3
22.5	3
23.5	3
24.5	3
24.6	3
26.2	3
26.7	3