Consider the following assembly program $($assume anything after ; is a comment$).$

MOV R$1,12$ ; Move the value $12$ into register R$1$

MOV R$2,3$ ; Move the value $3$ into register R$2$

SUB R$1,$ R$2$ ; Subtract the value of R$2$ from R$1$ and store the result in R$1$

What will be the final value stored in register R$1?$