0
Its not 21 y/o Its not 19 y/o Its not 18 y/o ITS 20 Y/O! yay
19-20 y/o
one score years
h-e-l-l-o-o-o-o-o
k-i-t-t-y-y-y-y-y
ex:
A={j,o,y}
subsets: {j}, {o}, {y}
{j,o}, {j,y}, {o,y}
{j,o,y}, {}