String studentsCourse01[] = {
    "gerardpiguillem@gmail.com",
    "bertapratsgarcia@gmail.com",
    "marcvilaseca@gmail.com",
    "taniailla@gmail.com",
    "ivanblasco@gmail.com",
    "joancapdevilabonet@gmail.com",
    "monicadevillamore@gmail.com",
    "brunobergeron@gmail.com",
    "polrubio@gmail.com",
    "olivergrau@gmail.com"
    };

String studentsCourse02[] = {
    "santi@hotmail.com",
    "eugenibosch@hotmail.com",
    "coralina@hotmail.com",
    "mireia@hotmail.com",
    "quima@hotmail.com",
    "manelmillan@hotmail.com",
    "toni@hotmail.com",
    "elisenda@hotmail.com",
    "gloria@hotmail.com",
    "merlibergeroncalduch@hotmail.com"
    };

String studentsCourse03[] = {
    "alex.arredondo@institutvidreres.cat",
    "diego.azorin@institutvidreres.cat",
    "noelia.batalle@institutvidreres.cat",
    "ivan.baya@institutvidreres.cat",
    "victor.camara@institutvidreres.cat",
    "sandra.dalmau@institutvidreres.cat",
    "denis.escobar@institutvidreres.cat",
    "oriol.lamelas@institutvidreres.cat",
    "marc.miquel@institutvidreres.cat",
    "martin.panzardo@institutvidreres.cat",
    "carles.ramos@institutvidreres.cat",
    "oscar.salome@institutvidreres.cat"
    };