# Test case 1
{f{a}{e{c{b}}{d}}}
{f{a}{c{e{b}{d}}}}
2.0
# Test case 2
{a{b}{c{e}{f}}{d}}
{a{b}{c{e}}{d}}
1.0
# Test case 3
{a{b}{c{e}{f}}{d}}
{a{b}{c}{d}}
2.0
# Test case 4
{a{x}{c{e}{f}}{d}}
{a{b}{c}{d}}
3.0
# Test case 5
{a{b}{c{e}{f}}{d}}
{a{b}{c}}
3.0
# Test case 17
{x}
{a{r}{d}{e{i}{l}{t{k}{g}{h}}}}
10.0