Lucky Larry's teacher asked him to substitute numbers for $a,b,c,d,e$ in the expression $a-(b+(c-(d+e)))$ and evaluate the result. Larry ignored the parentheses but added and subtracted correctly and obtained the correct result by coincidence. The numbers Larry substituted for $a,b$ were $1,2$ respectively, for $c$ was $4$, and for $e$ was $5$. What number did Larry substitute for $d$?