push (\u1 -> (\u2 -> (\u3 -> (\u4 -> (\u5 -> (\u6 -> (u4 u5) u6)))))) : | push (\u1 -> (\u2 -> u2)) | ret call lift (\u1 -> (\u2 -> u1 u2)) : | : | | push (\u1 -> (\u2 -> u2)) | | ret | call | : | | push (\u1 -> (\u2 -> u2)) | | call | | lift (\u1 -> (\u2 -> u1 u2)) | | call | | lift (\u1 -> (\u2 -> u1 u2)) | | ret | call | lift (\u1 -> (\u2 -> u1 u2)) | call | lift (\u1 -> (\u2 -> u1 u2)) | ret call lift (\u1 -> (\u2 -> u1 u2)) : | push Term | ret call lift (\u1 -> (\u2 -> u1 u2)) call lift (\u1 -> (\u2 -> u1 u2)) : | call | : | | push (\u1 -> (\u2 -> u2)) | | call | | lift (\u1 -> (\u2 -> u1 u2)) | | call | | lift (\u1 -> (\u2 -> u1 u2)) | | ret | call | lift (\u1 -> (\u2 -> u1 u2)) | call | lift (\u1 -> (\u2 -> u1 u2)) | ret call lift (\u1 -> (\u2 -> u1 u2)) call lift (\u1 -> (\u2 -> u1 u2)) ret