void DontCrossTheStreams(byte op, byte x, byte i)           // There's something very important I forgot to tell you.
{					                    // Don't cross the streams.
    strcpy_P(txt, (char*)pgm_read_word(&(inputs[i])));      // Why?
    digitalWrite(latchPin, LOW);                            // It would be bad.
    shiftOut(dataPin, clockPin, LSBFIRST, op);              // What do you mean, bad?
    digitalWrite(latchPin, HIGH);                           // Imagine all life as you know
    u8g2.clearBuffer();                                     // it stopping instaneously
    u8g2.drawStr(x,30,txt);                                 // and every molecule in
    u8g2.sendBuffer();                                      // your body exploding
    eop = op; ex = x; ei = i;                               // at the speed of light.  
 // Total protonic reversal.                                // That's bad.
}// Important safety tip, thanks Egon.