H_Partition_Midsize[ BLOCK_SIZES ] = {
    BLOCK_INVALID,  
    BLOCK_INVALID,  
    BLOCK_INVALID,  
    BLOCK_INVALID,  
    BLOCK_4X8,      
    BLOCK_8X4,      
    BLOCK_8X8,      
    BLOCK_8X16,     
    BLOCK_16X8,     
    BLOCK_16X16,    
    BLOCK_16X32,    
    BLOCK_32X16,    
    BLOCK_32X32,    
    BLOCK_INVALID,  
    BLOCK_INVALID,  
    BLOCK_INVALID,  
    BLOCK_INVALID,
    BLOCK_INVALID,
    BLOCK_INVALID,  
    BLOCK_INVALID,  
    BLOCK_INVALID,  
    BLOCK_4X16,     
    BLOCK_16X4,     
    BLOCK_8X32,
    BLOCK_32X8,
    BLOCK_INVALID,
    BLOCK_INVALID,
    BLOCK_INVALID,
    BLOCK_INVALID,
    BLOCK_INVALID,
    BLOCK_INVALID
}