diff --git a/plan.txt b/plan.txt
index 631a68d..7edbef7 100644
--- a/plan.txt
+++ b/plan.txt
@@ -2,4 +2,4 @@ The Intel OpCode Syntax can tell if there is ModRM byte, as well as if registers
 and can tell size of immediate (ib iw id for example). The /digit can also indiciate presense of ModRM.
 The size of displacement is also dictated by cw/cd.
 ModRM also can tell if there is SIB byte or no.
-VEX prefixes. 0xC5 for 3-byte VEX and 0xC4 for 2-byte prefix
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+VEX prefixes. 0xC5 for 2-byte VEX and 0xC4 for 3-byte prefix
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