sentences:  The distinction is important in Bengali, as its orthography was adopted from Sanskrit and ignores several millennia of sound change.All writing systems differ at least slightly from the way the language is pronounced, but this is more extreme for languages like Bengali.For example, the three letters শ, ষ, and স had distinct pronunciations in Sanskrit, but over several centuries, the standard pronunciation of Bengali (usually modelled on the Nadia dialect) has lost the phonetic distinctions, and all three are usually pronounced as IPA .