OVERLAP_VALUE=   1
OVERLAP_LESSER=  2
OVERLAP_GREATER= 3
OVERLAP_DICT_HUMAN= {
    OVERLAP_NONE:     { SOURCE: 0,       RESULT: 0       },
    OVERLAP_SAME:     { SOURCE: value,   RESULT: value   },
    OVERLAP_ADD:      { SOURCE: 0,       RESULT: value   },
    OVERLAP_REMOVE:   { SOURCE: value,   RESULT: 0       },
    OVERLAP_INCREASE: { SOURCE: lesser,  RESULT: greater },
    OVERLAP_DECREASE: { SOURCE: greater, RESULT: lesser  }
    }
OVERLAP_DICT= {}
for OVERLAP in OVERLAP_DICT_HUMAN:
    OVERLAP_DICT[SOURCE][OVERLAP]= OVERLAP_DICT_HUMAN[OVERLAP][SOURCE]
    OVERLAP_DICT[RESULT][OVERLAP]= OVERLAP_DICT_HUMAN[OVERLAP][RESULT]