export PYTHONPATH=/hpc2hdd/home/qxiao183/PLM/Megatron-LM

python merge_datasets.py \
    --input /hpc2hdd/home/qxiao183/PLM/dataset/Matrix-Math/new_split \
    --output-prefix /hpc2hdd/home/qxiao183/PLM/dataset/Matrix-Math/new_merge/train