1 import M5a._

     2 

     3 val urban_generate = 

     4 """+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.[-]++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.[-]"""

     5 

     6 assert(generate("ABC".toList) == urban_generate)