I can not enter complex value using the INPUT command

Good evening! I am a beginner and would like to know how to use the input layer and enter a complex value in HP prime.
When I run the program the box to put the values appears, but when I try to put complex values, both polar (preferable) and rectangular forms have invalid data. Could anyone help me about this?
Grateful!
When I run the program the box to put the values appears, but when I try to put complex values, both polar (preferable) and rectangular forms have invalid data. Could anyone help me about this?
Grateful!