Problem 2073. Split a given string from the first instance of a given character

A simple operation to split a given string into two substrings at the point where the desired character is first found. e.g.

inputString: 'we have 6 cars' split it from '6'

output: 'we have ' and '6 cars'

If the desired character is not found then first substring is same as the whole string and the second string is empty string, i.e. y2='';