(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [(assign_pair lhs:(sh_lhs_expr.Name name:x) op:assign_op.Equal rhs:{<1>} spids:[7])]
    )
    (C {<cd>} {<'/'>})
    (command.ShAssignment
      pairs: [(assign_pair lhs:(sh_lhs_expr.Name name:y) op:assign_op.Equal rhs:{<2>} spids:[14])]
    )
    (command.ShAssignment
      pairs: [(assign_pair lhs:(sh_lhs_expr.Name name:z) op:assign_op.Equal rhs:{<0>} spids:[17])]
    )
  ]
)