import sys

x=int(sys.argv[1])

y=int(sys.argv[2])

z=int(sys.argv[3])

if z==1:

 print 'Everybody sing a song:'+(' '+'la-'*(x-1)+'la')*y+'!'

else:

 print 'Everybody sing a song:'+(' '+'la-'*(x-1)+'la')*y+'.'

