4,    adults,    animals,    artiodactyl,    Artiodactyla,    Babies,    Babys,    calls,    cries,    cry,    format,    gape,    gapes,    hippos,    lakes,    laterally,    mammals,    move,    movement,    moves,    outdoors,    outside,    river,    scream,    screams,    shouting,    shouts,    summerly,    summertime,    summery,    sunny,    sunshine,    swimming,    swims,    to,    yawn,    yawns,