sub test_input {
    return <<'END_INPUT';
User_Alias FOO = abc, def
END_INPUT
}

sub test_input {
    return <<'END_INPUT';
User_Alias FOO = abc, def : BAR = lmnd, adfs : BAZ = fda, reqw
END_INPUT
}

sub test_input {
    return <<'END_INPUT';
User_Alias FOO = abc, def : BAR = lmnd, adfs : BAZ = fda, reqw
User_Alias ZAB = gfd, aed
END_INPUT
}