"PERSON"	"DAY"	"Y"
"A"	1	20
"A"	2	22
"A"	3	20
"A"	4	21
"A"	5	18
"B"	1	24
"B"	2	21
"B"	3	18
"B"	4	22
"B"	5	20
"C"	1	16
"C"	2	18
"C"	3	14
"C"	4	13
"C"	5	16