Sesame design contest submission format

Can we create an art on any other application (procreate) and then transfer some part of the design from that software to illustrator for the final submission ?? or we need to create in vector only ??

@KHUSHBOO  it’s better to ask your contest questions in this thread https://community.zazzle.com/t5/general-zazzle-discussion/questions-about-the-sesame-street-design-contest/m-p/113321