headers = ['a','b','c','d','e']
list = [['1','2','3','4','5'],['6','7','8','9','10'],
        ['11','12','13','14','15']]

a 1
b 2
c 3
d 4
e 5
a 6
b 7
c 8
d 9
e 10
a 11
b 12
c 13
d 14
e 15