y	x	zona
 42.5	33.1	A
 36.8	42.0	A
 42.6	47.8	A
 41.2	53.4	A
 48.6	59.6	A
 75.2	63.9	B
 83.4	68.4	B
 83.3	72.3	B
116.8	77.8	B
114.3	80.8	B
122.8	96.5	C
125.6	101.8	C
132.5	106.2	C
127.4	112.6	C
147.8	120.5	C