Concurrency and interleaving

Problem: a concurrent program with two processes, p and q,defined as follows, A,B,C,D, and E are arbitrary atomic (indivisible) statements.  Assume that the main program (not shown) does a parbegin of the two processes.
void p()
{
   A;
   B;
   C;
}
void q()
{
   D;
   E;
}
Show all the possible interleavings of the execution of the preceding two processes(show this by giving execution “traces” in terms of the atomic statements).