r = open('DATA5.txt', 'r')
w = open('OUT5.txt', 'w')

w.write( "1: 2 3 5\n")
w.write( "2: 1 3 5\n")
w.write( "3: 4\n")
w.write( "4: \n")
w.write( "5: 2 3\n")