Assign a letter grade to the student based on the given score.
Score: 85
Based on the given score of 85, the student's letter grade would be a B.
Complete the following task based on the instruction and optional input provided.### Instruction:
Assign a letter grade to the student based on the given score.

### Input:
Score: 85

### Output:
Based on the given score of 85, the student's letter grade would be a B.