#Bill James 'Safe lead calculator'
#from http://www.slate.com/id/2185975/

#take the number of points one team ahead
pointsStr=raw_input("Enter the number of the lead in the play: \n")
pointsInt=int(pointsStr)

#subtract threee
points=pointsInt-3

#add a half-point or not 
#depenf the ball is has or not
has_ball=raw_input("Does the lead team has the ball or not(Yes or No): \n")

if has_ball == 'Yes':
	points=points+0.5
else:
	points=points-0.5
if points < 0:
	points=0
#square the points to get the conclusion
points=points **2

#to judge the condition whether we should judge there should the
#time that left

seconds=int(raw_input("Enter the number of seconds remaining: \n"))

if points > seconds:
	print "Lead is safe!"
else:
	print "Lead is not safe!"