f$=$io$,$open$("$grid$.$txt$","$r$")$

io$.$input$($f$)$

print$($io$.$read$("*$a$11"))$

io$.$ close$()$

$10$cal command $=$ io read $()$

if command$==$ "showco$1"$ thed $--$Q$1-$A

local col$=$ tonumber io $*read()$

if col then

showColumn$($grid$,$ col$)$

else

print$("$Invalid column number

else

if command$==$ "showrow" then $-01-$

local row $=$ tonumber io$,$ read$()$

if row then

showRow$($grid$,$ row$)$

a$)=0$

Sheet$3$

$2101$ exam wout mains $-$ q$2$return