1+2+4+5+6+8+9+10+21+22+28+34+40+42+47: 
3+11+12+17+20+23+24+27+30+31+32+41+43: 
7+13+19+25+29+36: 
14+15+16+18: 
26+33+35+37+38+39+44+45+46: