char kespop $[4][4]=$

${\{}^{\text{'}}{1}^{\text{'}},{?}^{+2}{?}^{\text{'}},{?}^{\text{'}}{3}^{\text{'}},{?}^{\text{'}}{A}^{\text{'}}\},$ Row $0$

${\{}^{\text{'}}{B}^{\text{'}},{?}^{\text{'}}{F}^{\text{'}},{?}^{\text{'}}{E}^{\text{'}},{?}^{\text{'}}{D}^{\text{'}}\}$ Row $3$

colo col $1$ col $2$ Col $3$

void setur$()$

$i$

for$($int $i=0$;$1<mn\; id="EditorElement\_912017">4</mn>$;$1+$

ainMede$($solpinsth$],$ ourput$)$

for$($int $1=0$;$1<mn\; id="EditorElement\_911941">4</mn>$;$1+4$

atrode$($towptos$[1],$ TNPUT$\_$PULLUP$)$;

$?$

vold teg$()$

forc$($int $t=0$;$1<mn\; id="EditorElement\_911829">4</mn>$;$it+)$

didtadsette$($solpine$[$d$],$Low$)$

foc$($int $j=0$;$j<mn\; id="EditorElement\_911751">4</mn>$;$j++$

delay $(12)$:

delay $(5$ee$)$:

Sechalideins$($keymap$[$j$][1])$

$?$

Select one:

a$.2$

b$.5$

c$.$ None of the choices

d$.$ C