def diameters(d_glass):
    d_diam = {}
    for key in d_glass:
        diam, bridge = key.split('-')
        if diam in d_diam:
            for item in d_glass[key]:
                if item not in d_diam[diam]:
                    d_diam[diam].append(item)
        else:
            d_diam[diam] = d_glass[key]
    for diam in d_diam:
        d_diam[diam].sort()
    return d_diam