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#!/usr/bin/env python
# -*- coding: UTF-8 -*-

def arraysProduct( arrays ):
    """Recursive returns product off arrays"""
    if len( arrays ) == 1:
        return arrays[ 0 ]
    res = arraysProduct( arrays[ 1: ] )
    Res = []
    for val1 in res:
        for val2 in arrays[ 0 ]:
            Res.append( val2 + " " + val1 )

    return Res

if __name__ == "__main__":
    arrays= [
              [ "hej", "goddag", "godaften", ],
              [ "Kurt", "Ole", "Hans", ],
              [ "farvel.", "vi ses.", "ciao.", ],
              [ "Julie", "Camilla", "Hans", "Thomas", "Ulrik", ],
            ]
    print "\n".join( arraysProduct( arrays ) )