How to distinguish between RCtrl and LCtrl

[AutoStarter]

Is there a way to trigger hotkeys only at right or left modifier keys (Ctrl / Win etc.)? 
I tried so far the following but the trigger is activated on right and also on left control key:
var hk = Triggers.Hotkey;
hk["RCtrl+Left"] = o => {
    print.it($"{o} was pressed.");
};
hk["RCtrl+Right"] = o => {
    print.it($"{o} was pressed.");
};
Could anyone give me a hint please?

[Gintaras]

Code:

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hk["Ctrl+Left", TKFlags.RightMod] = o => {
    print.it($"{o} was pressed.");
};
hk["Ctrl+Right", TKFlags.RightMod] = o => {
    print.it($"{o} was pressed.");
};

[AutoStarter]

Thanks a lot for the quick solution Gintaras.