fee = 0

for i in range(30,1441,30):
  if i%60 == 0:
  	if i<=(2.5*60):
		  fee += 0
  	elif i<=(6.5*60):
  		fee += 30
  	else:
  		fee += 60
  if i!=1440:
    print '"%d": %d,' %(i,fee)
  else:
    print '"%d": %d' %(i,fee)