# 1702.py

print '--'.join(['alfa','beta','rho'])
# alfa--beta--rho

(a,b,c)=('Africa','Asia','Europa')

print ''.join([a,b,c])
# AfricaAsiaEuropa

print ' '.join([a,b,c])
# Africa Asia Europa

print ', '.join([a,b,c])
# Africa, Asia, Europa