Apply unknownprop_ce9033a67ef84c6ab0b67c7e947b752573b6048f7ffe5e81030bc8cffa5f9d29 with
4ae4a.. (4ae4a.. (4ae4a.. (4ae4a.. (4ae4a.. 4a7ef..)))),
4a7ef...
The subproof is completed by applying unknownprop_a28806a210b61567a3ab53c41670dd2cdd0954582f81581ebc35a00116effb38.