| t | class AssignmentError(Exception): | t | class AssignmentError(Exception): | 
             |     pass |  |     pass | 
             | vars_dict = {} |  | vars_dict = {} | 
             | while (line := input().strip()): |  | while (line := input().strip()): | 
             |     if not line[0] == '#': |  |     if not line[0] == '#': | 
             |         try: |  |         try: | 
             |             if '=' in line: |  |             if '=' in line: | 
             |                 expression = line.split('=', 1) |  |                 expression = line.split('=', 1) | 
             |                 var, value = (expression[0].strip(), expression[1].strip |  |                 var, value = (expression[0].strip(), expression[1].strip | 
             | ()) |  | ()) | 
             |                 if var.isidentifier(): |  |                 if var.isidentifier(): | 
             |                     vars_dict[var] = eval(value, vars_dict) |  |                     vars_dict[var] = eval(value, vars_dict) | 
             |                 else: |  |                 else: | 
             |                     raise AssignmentError |  |                     raise AssignmentError | 
             |             else: |  |             else: | 
             |                 print(eval(line, {'__builtins__': {}}, vars_dict)) |  |                 print(eval(line, {'__builtins__': {}}, vars_dict)) | 
             |         except AssignmentError: |  |         except AssignmentError: | 
             |             print('Assignment error') |  |             print('Assignment error') | 
             |         except SyntaxError: |  |         except SyntaxError: | 
             |             print('Syntax error') |  |             print('Syntax error') | 
             |         except NameError: |  |         except NameError: | 
             |             print('Name error') |  |             print('Name error') | 
             |         except: |  |         except: | 
             |             print('Runtime error') |  |             print('Runtime error') |