# -*- coding: utf-8 -*-
s=gets.chomp
s=s+"."
a=Array.new(101).map{Array.new(0,0)}
b=Array.new(101).map{Array.new(0,0)}
d=0
x=0
t=0
r=0
n=s.length-1
for i in 0..n
  if s[i]=="ｗ"
    if d==0
      r=i
    end
    d=d+1
  else
    if d>0
      if r!=0
        a[d].push(t)
        b[d].push(r)
        if x<d
          x=d
        end
      end
      t=i
      d=0
    end
  end
end
m=a[x].length
if m>0
  f=0
  for i in 0..m-1
    if a[x][i]!=b[x][i]
      for j in a[x][i]..b[x][i]-1
        print(s[j])
      end
      puts ""
      f=1
    end
  end
  if f==0
    puts ""
  end
else
  puts ""
end