pasting two wav's together

i had two live tunes that needed cutting,one led into the second.. i cut them to fit together better. now, i need to put them back together to hear how it sounds, so i can hear how the splice did... how do i put them together and what free program does that?

cool edit pro 30 day trial ran out so how do i get audacity tp paste the two wav's together and play it to hear the splice to hear it