Input (grade 13): Most of the suburbs of Sunderland are situated towards the west of the city centre with 70% of its population living on the south side of the river and 30% on the north side.
Output (grade 8): Monkwearmouth is on the north side of the river. Most of the suburbs of Sunderland are west of the city centre with 70% of its population living on the south side of the river and 30% on the north side.