an ice cream parlour has ice creams in eight different varieties. no of ways of choosing ice creams taking atleast two ice creams of the same variety is

How many ice cream has to be selected????? i.e. Suppose 8 different variety`s are as follows - a,b,c,d,e,f,g,h . Now if we select atleast 2 from a then further we can`t take any step.