This is the break of challenge message 5 as seen in the server logs:

Date: 2005-12-20 19:33:48
Score: 1895578
UKW: B
W/0: 142
Stecker: BYDHFJIRKTLOMNPUSXVW
Rings: AAC
Message key: VJF

naqsqubdienstnullneunnulmnulluhrbefohlenenraumbezowenxmunitionsgabestellex
saiesjehsalesjexxbetriebstofhqthsjrdvujhwvtpsljuejsfiwqzxruwoybcywpymaxqdl
ujhkemwreenthx

As you can see, the text after betriebstof is gibberish. This is due to the fact that the correct middle ring setting has yet to be found.

This is how the message decrypts with all parts of the key correct:

UKW: B
W/0: 142
Stecker: BYDHFJIRKTLOMNPUSXVW
Rings: SVD
Message key: OFG

naqsqubdienstnullneunnullnulluhrbefohlenenraumbezogenxmunitionsgabestellex
salesjehsalesjexxbetriebstoffausgabestellexwalujxwolujxxstabxluxomaxlukoma
xhartjensteinx

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