Acid and Base

The pH of a solution measures how water ionizes to form $H^+$ (acids) or $OH^-$ (bases).

There are four variables ($pH$, $pOH$, $H^+$, and $OH^-$) and two equations:

$pH = -\log_{10}(H^+)$

$pOH = -\log_{10}(OH^-)$

They are also related by $pH + pOH = 14$.

The first line contains the number of data sets. Each data set is either an $H^+$ concentration written as H = ... or an $OH^-$ concentration written as OH = ....

For each data set, print the pH rounded to the nearest hundredth.