>>> echantillon
[[165, 18], [180, 19], [174, 22], [181, 17], [184, 12], [180, 16], [172, 10], [169, 3],
[168, 25], [183, 5], [181, 4], [188, 12], [188, 23], [179, 2], [160, 23], [181, 14], 
[183, 1], [170, 7], [172, 3], [182, 15], [161, 9], [167, 1], [164, 22], [189, 17], 
[173, 11], [181, 11], [164, 11], [168, 25], [163, 14], [165, 12], [188, 8], [183, 2], 
[174, 19], [188, 8], [179, 0]]