Statement

A friend of Luca is particularly interested in history: he is writing his final thesis to graduate in this subject. During his researches, he is writing an appendix listing all the dates of death of the soldiers who fought in a certain battle. He has already found an old book which is perfectly suited to accomplish the task, but he has been unlucky: he is unable to read from the yellowed pages the separator (`/') between days, months and years of the dates. You know that: (1) The day is a number between 1 and 31 (except for shorter months), optionally preceded by a zero when it is a single digit (i.e., 05 and 5 are both possible). (2) The month is a number between 1 and 12, optionally preceded by a zero when it is a single digit. All months have 31 days except April, June, September and November which have 30 days and February which has 28 days...