Categorize the input tweet's emotional tone into one of three groups.
Options: negative, positive

Upgrades 4/7: $AMT $BHP $BK $CHH $ENI $EQNR $ETR $EXR $FCX $HOLX $HSIC $LOW $LSI $MAR $MAS $MGP $MHK $MXL $NGG $NWE… https://t.co/jXZNb22Cwb
positive