Input (grade 13): Anne's mother, Sophie of Mecklenburg-G Ã 1\/4 strow, however, was only seventeen, and three years later did bear Frederick a son, the future Christian IV of Denmark.
Output (grade 5): Anne's mother, Sophie of Mecklenburg-G Ã 1\/4 strow, however, was only 17. Three years later she did give birth to a son.