<image>As shown in the image, a computer calculation program starts with an input x = -1. The final output of the program is ____ (Note: The calculation program in the image means: multiply the input number by 5, then subtract -1 from the result and compare it with -4. If the result is less than -4, output the result. If the result is greater than or equal to -4, input the result back into the computer for further calculation.)
