text: #ifndef HIERARCHY_BIG_NUMBER_SUB_H
  #define HIERARCHY_BIG_NUMBER_SUB_H
  
  #include "BigNumberT.h"
  
  ByteT BigNumberSub(BigNumberT *NumberResult,
                     BigNumberT *Number1,
                     BigNumberT *Number2);
  
  void BigNumberSubMod(BigNumberT *NumberResult,
                       BigNumberT *Number1,
                       BigNumberT *Number2,
                       BigNumberT *Mod);
  
  #endif
  