def inp() a=gets.chomp.split(" ").map(&:to_i)end 
def inpf() a=gets.chomp.split(" ").map(&:to_f)end
def inps() a=gets.chomp.split(" ")end  
def copy(a) Marshal.load(Marshal.dump(a)) end
def kaizyo(n)(n < 2)? 1 : (2..n).inject(:*) end
def scount(a,b) a.each{|n|b[n]+=1} end
def na(n,d=0) Array.new(n,d)end
def na2(n,m,d=0) Array.new(n){Array.new(m,d)}end
def na3(n,m,l,d=0) Array.new(n){Array.new(m){Array.new(l,d)}}end

s = inps[0]
max = 0
x = 0
ans = []
now = 0
s.each_char do |c|
  if c == "ｗ"
    s.slice!(0,1)
  else
    break
  end
end
s+="."
s.each_char do |c|
  if(c == "ｗ")
    now += 1
  elsif(now > 0)
    if(max < now)
      max = now
      ans = [x]
    elsif(max == now)
      ans.push(x)
    end
    now = 0
    x += 1
  end
end
s = s.split("ｗ")
s.delete("")
ans.each do |d|
  puts s[d]
end



=begin


=end