X Incorrect.

Propose an efficient synthesis for the following transformation:

The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters $($without spaces or punctuation, such as "EBF"$).$ If there is more than one correct solution, provide just one answer.

A$.Fe,H_3{O}^{+}$

D$.NaN{O}_2,HCl$

G$.$ NaOH,$H_{2}O,$ heat

B$.$

E$.$ CuBr

H$.$ CuCN

H$.$ CuCN

I. $B{r}_2,FeB{r}_3$