Name three coastal cities in India.
1. Mumbai (formerly known as Bombay)
2. Chennai (formerly known as Madras)
3. Kolkata (formerly known as Calcutta)
Complete the following task based on the instruction and optional input provided.### Instruction:
Name three coastal cities in India.

### Output:
1. Mumbai (formerly known as Bombay)
2. Chennai (formerly known as Madras)
3. Kolkata (formerly known as Calcutta)