Apply unknownprop_4c4b27a97d7f3e81d4abb7629b850d6c55c186f55f30e3dfae132a3ddf1e0a30 with
4ae4a.. (4ae4a.. (4ae4a.. 4a7ef..)),
4a7ef...
The subproof is completed by applying unknownprop_908178e99fde3dae62c02b64ea0c0ee3bf2c0e09b3da64c73a5307a7bb9c1e9e.