local s = io.read()
local t = io.read()
if #t == 1 then
  if s:find(t) then
    print(-1)
  else
    print(0)
  end
else
  local c = 0
  local pos = 1
  while true do
    z, pos = s:find(t, pos)
    if pos then
      c = c + 1
    else
      break
    end
  end
  print(c)
end