Utilize the input text as a context reference, choose the right relationship between HDFC and HDFC Bank from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

We have also told our people that, given our expectation of delivery and the superhuman efforts they have put in -- which is the main strength of HDFC Bank, the training and the HDFC Bank team.

Answer: operator