Prison Break

You find yourselves in the DDR of the 60s in East Berlin. You have been unjustly accused by the Stasi of spying for the West. Since there is no evidence of your innocence, you must go to prison for an indefinite period. But you are very lucky, because you have found out that the prisoner before you somehow managed to escape from this jail. This gives you hope. There are also rumors that they left hints for other innocent inmates in the cells before their escape and hid them from the guards. The guards' shift change takes place in an hour. Each guard checks the cells before starting their shift. You therefore have only 60 minutes left for your endeavor.