Given sets $A, B, C$, and $U$, find the set $A-B$ using the listing method. \[ \begin{array}{l} A=\{1,4,6,7\} \\ B=\{0,1,4\} \\ C=\{5,7\} \\ U=\{0,1,2,3,4,5,6,7\} \end{array} \] \[ \mathrm{A}-\mathrm{B}=\{\square\} \] (Use a comma to separate answers as needed.)

Step 1 ：The set difference $A - B$ is defined as the set of elements that are in $A$ but not in $B$.

Step 2 ：So, we need to find the elements that are in set $A$ but not in set $B$.

Step 3 ：The elements in set $A$ are $\{1,4,6,7\}$ and the elements in set $B$ are $\{0,1,4\}$.

Step 4 ：Comparing these two sets, we see that the elements $1$ and $4$ are in both sets, so they are not included in the set difference $A - B$.

Step 5 ：The elements $6$ and $7$ are in set $A$ but not in set $B$, so they are included in the set difference $A - B$.

Step 6 ：Therefore, the set difference $A - B$ is $\{6,7\}$.