s = gets.chomp
k = gets.to_i
n = s.size

tmp = 0
(0..n-1).each do |i|
  next if s[i] == '*'

  if s[i] == s[i+1]
    s[i+1] = '*'
    tmp += 1
  end
end

tmp2 = 0
if s[-1] != '*' && s[0] == s[-1]
  tmp2 = 1
end

puts tmp * k + tmp2 * (k-1)
