$=$ PRINT$-$OPTIMAL$-$PARENS$((s,1,6).$

PRINT$-$OPTIMAL$-$PARENS $(s,i,j)$

if $i==j$

print $"A_i$

else print $"$

PRINT$-$OPTIMAL$-$PARENS $(s,i,s[i,j])$

PRINT$-$OPTIMAL$-$PARENS $(s,s[i,j]+1,j)$

print $")"$

Given the following matrix $s,$ what would the output of the algorithm above be$?$