A=Amazonas,Amstel,Aller;
B=Bigge,Belaja,Blies;
C=Colorado,Chang Jiang,Churchill River;
D=Donau,Drau,Denver;
E=Enns,Ems,Ebro;
F=Fulda,Fischa,Franklin River;
G=Ganges,Gera,Garonne;
H=Hudson,Havel,Horloff;
I=Inn,Iller,Isar;
J=Jardine River,Jagst,Jana;
K=Kongo,Kerka,Kama;
L=Lieser,Lahn,Limpopo;
M=Moldau,Mosel,Maas;
N=Nil,Niger,Nagara;
O=Oder,Our;
P=Po,Pegnitz;
Q=Quiantang,Quequu Grande;
R=Ruhr,Rio Grande,Rhein;
S=Salzach,Saale,Saar;
T=Themse,Tauber,Traun;
U=Ural,Urach,Uele;
V=Volchov,Virgin River,Victoria;
W=Wolga,Wutach,Weser;
X=Xiang,Xuchitlan;
Y=Yangtse,Kiang,Yarra;
Z=Ziller,Zongo,Zwonitz;