Santa was once again back at the north pole after completing his last challenge. And once again the elf entered the office with a paper in the hand. "Another letter with a challenge for me?" Santa asked. "Well... Not really a letter, but actually a fax." the elf replied. "But it seems..." he tried to continue, but Santa interrupted him: "Wait! Did you say fax? Like an oldfashioned telefax? Do we really still have one of those?" "Of course we do. We want the children to be able to reach us in as many ways as possible." "Uh. Well. I see. But what does the fax say?" "You can see for yourself." the elf said as he handed over the paper.
After looking at it for a little while Santa continued: "This certainly seems like it is another challenge, but it doesn't say who sent it. Do you know where the fax was sent from?" "Not really." the elf replied "But according to the number it seems to be sent from a Norwegian university." "I am not sure how helpful that is." Santa continued. "But I still have some time before Christmas, so I suppose I can try to solve this one as well. Please don't disturb me in the nearest future."
