['3', '20']
[['3', '20']]
['7', '16']
[['3', '20'], ['7', '16']]
['7', '9']
[['3', '20'], ['7', '16'], ['7', '9']]
['11', '13']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13']]
['15', '9']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9']]
['15', '16']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9'], ['15', '16']]
['19', '20']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9'], ['15', '16'], ['19', '20']]
['15', '24']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9'], ['15', '16'], ['19', '20'], ['15', '24']]
['15', '31']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9'], ['15', '16'], ['19', '20'], ['15', '24'], ['15', '31']]
['11', '27']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9'], ['15', '16'], ['19', '20'], ['15', '24'], ['15', '31'], ['11', '27']]
['7', '31']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9'], ['15', '16'], ['19', '20'], ['15', '24'], ['15', '31'], ['11', '27'], ['7', '31']]
['7', '24']
[['3', '20'], ['7', '16'], ['7', '9'], ['11', '13'], ['15', '9'], ['15', '16'], ['19', '20'], ['15', '24'], ['15', '31'], ['11', '27'], ['7', '31'], ['7', '24']]