170 #define F2(x, y, z) F1(z, x, y)  macro
208   MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562,  5);  in MD5Transform()
209   MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340,  9);  in MD5Transform()
210   MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14);  in MD5Transform()
211   MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20);  in MD5Transform()
212   MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d,  5);  in MD5Transform()
213   MD5STEP(F2, d, a, b, c, in[10]+0x02441453,  9);  in MD5Transform()
214   MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14);  in MD5Transform()
215   MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20);  in MD5Transform()
216   MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6,  5);  in MD5Transform()
217   MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6,  9);  in MD5Transform()
218   MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14);  in MD5Transform()
219   MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20);  in MD5Transform()
220   MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905,  5);  in MD5Transform()
221   MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8,  9);  in MD5Transform()
222   MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14);  in MD5Transform()
223   MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20);  in MD5Transform()