the correct syntax to pipe maskprocessor | cudahashcat in linux?

[bsec]

Try:
./usr/share/maskprocessor/mp.bin -q 3 -r 4 ?d?d?d?d?d?d?d?d?d?d | /usr/share/cudahashcat/cudaHashcat64.bin -w 3 -t 10 -m 2500 /root/capture.hccap -a 3