For conducting a group activity, Ms. Anju, a class 4 teacher has used a collection of pebbles. She has distributed 1/5th of the pebbles to group 1, 1/4th to group 2 and 1/3rd to group 3. After distributing if she has 26 pebbles left with her, what was the minimum number of pebbles she might have brought in the class?