# http://yukicoder.me/problems/432
# No.197 手品
hats=Array.new(2)
hats[0]=gets.chomp
num=gets.to_i
hats[1]=gets.chomp

apos = Array.new(2).map{ Array.new }
(0...hats.length).each{|i|
    cnt = 0
    hats[i].each_char.with_index{|c,j|
        if(c=='o')
            apos[i][cnt] = j;
            cnt+=1
        end
    }
}

if apos[0].length != apos[1].length
    puts "SUCCESS"
    exit
end
difftotal = 0
(0...apos[0].length).each{|i|
    diff = (apos[0][i] - apos[1][i]).abs
    difftotal += diff
}
if difftotal > num || (num-difftotal)%2==1
    puts "SUCCESS"
else
    puts "FAILURE"
end