<Tr> <Th_colspan="2"> Italian Peninsula Apennine Peninsula Penisola italiana, Penisola appenninica, Terraferma, Continente or lo Stivale (Italian) </Th> </Tr> <Tr> <Td_colspan="2"> Satellite view of the peninsula in March 2003 . </Td> </Tr> <Tr> <Th_colspan="2"> Geography </Th> </Tr> <Tr> <Th> Location </Th> <Td> Southern Europe </Td> </Tr>

Name the four countries that surround the italian states