Input (grade 4): This left him no time to train during the day, so he would sneak out of the house at night to train, sometimes at 1 or 2 a.m. and often in the freezing cold.
Output (grade 4): He had no time to train during the day, so he would sneak out of the house at night to train, sometimes at 1 or 2 a.m. and often in the freezing cold.