Const
String: ESC + Start of String (SOS) Followed by a control string terminated by ST (0x9C) which (unlike DCS, OSC, PM or APC) may contain any character except SOS or ST. *
ESC
SOS
ESC + "X" Copy
ESC + "X"
https://en.wikipedia.org/wiki/C0_and_C1_control_codes
String:
ESC+ Start of String (SOS) Followed by a control string terminated by ST (0x9C) which (unlike DCS, OSC, PM or APC) may contain any character except SOS or ST. *