def getExclusiveReactions(project, orgs=set()):
    """
    Given a bunch of organisms, get two dicts
    mreacts: org_id -->  set(re_id, ...) (common)
    ereacts: org_id -->  set(re_id, ...) (exclusive)
    """
    from ductape.storage.SQLite.database import Kegg
    kegg = Kegg(project)
    ereacts = kegg.getExclusiveReactions(orgs)
    mreacts = {}
    for org_id in orgs:
        mreacts[org_id] = set()
        for oR in kegg.getOrgReact(org_id):
            mreacts[org_id].add(oR.re_id)
    for org_id in orgs:
        mreacts[org_id].difference_update(ereacts[org_id])
    return mreacts, ereacts
