Give them one of these.
________??$$$$$$$$$??___________#
#________????$$$$$$$??????________#
#______??????????????????$$_______#
#_____??$$$?????????????$$$$$_____#
#____??$$$$$???_____?????$$$$$____#
#____???$$$??__#___#__????$$$$____#
#_____???????_________???????_____#
#______??????_#_____#_??????______#
#_______?????__#####__?????_______#
#_________????_______????_________#
#___________#???___???#___________#
#_______777####_____###777________#
#_____7777#####_____####7777______#
#____7777######_____#####7777_____#
#___77777#####_______#####7777____#
#__77777######???????#####_7777___#
#_777__7######???????######7_777__#
#________##??????????????#________#
#________??????????????????_______#
#_______????????????????????______#
#______$$$$???????????????$$$_____#
#___$$$$$$$$????????????$$$$$$$$__#
#__$$$$$$$$$$$_________$$$$$$$$$$_#
#___$$$$$$$$$___________$$$$$$$$__#