def has$\_$ship$($fleet$\_$grid: list$[$list$[$str$]],$ row$\_$start: int, col$\_$start: int,

ship$\_$symbol: str$,$ ship$\_$size: int$)->$ bool:

$"""$Return True if and only if a ship that $(1)$ uses ship$\_$symbol as its ship

symbol and $(2)$ has length ship$\_$size appears in fleet$\_$grid starting at

position $($row$\_$start, col$\_$start$),$ where $($row$\_$start, col$\_$start$)$ is the

top$-$most$/$left$-$most corner of the ship.

If the ship has ship$\_$size $2$ or more and appears as both a column and a row,

return False.

Preconditions:

$0$ len$($fleet$\_$grid$)$

len$($fleet$\_$grid$[$i$])==$ len$($fleet$\_$grid$)$

for each value of $i$ in range$($len$($fleet$\_$grid$))$

$0$ row$\_$start $$ len$($fleet$\_$grid$)$

$0$ col$\_$start $$ len$($fleet$\_$grid$)$

MIN$\_$SHIP$\_$SIZE ship$\_$size MAX$\_$SHIP$\_$SIZE

fleet$\_$grid$[$i$][$j$]!=$ ship$\_$symbol for each of the coordinates

$(i,j)=($row$\_$start $-1,$ col$\_$start$)$ or

$(i,j)=($row$\_$start, col$\_$start $-1)$

when those coordinates are valid indexes for fleet$\_$grid$>$ has$\_$ship$($grid$,0,1,\text{'}$b$\text{'},2)$

True

$$ has$\_$ship$($grid$,0,1,\text{'}$b$\text{'},1)$

False

$$ has$\_$ship$($grid$,0,1,\text{'}$b$\text{'},3)$

False

$$ has$\_$ship$($grid$,1,0,\text{'}a\text{'},1)$

True

$$ grid $=[[\text{'}$b$\text{'},\text{'}$b$\text{'},\text{'}$b$\text{'}],[\text{'}$b$\text{'},$ EMPTY, EMPTY$],[\text{'}$b$\text{'},$ EMPTY, EMPTY$]]$

$$ has$\_$ship$($grid$,0,0,{?}^{\text{'}}{b}^{\text{'}},3$

False

$"""$