WAAG
| 4 |
WAAL
| 4 |
WEICHSEL
| 8 |
WEIDE
| 5 |
WERRA
| 5 |
WERSE
| 5 |
WESER
| 5 |
WIED
| 4 |
WIESE
| 5 |
WILIA
| 5 |
WOLGA
| 5 |
WUEWRM
| 6 |
WURM
| 4 |
3 | |
YBBS
| 4 |
YONNE
| 5 |
YSER
| 4 |
ABLACH
| 6 |
ADAJA
| 5 |
AGER
| 4 |
ALAGON
| 6 |
ALBULA
| 6 |
ALLIER
| 6 |
ALUTA
| 5 |
ANGERAPP
| 8 |
ANGERMANELF
| 11 |
ANGERMANNAELV
| 13 |
ARANYOS
| 7 |
ARDSCHESCH
| 10 |
ARGES
| 5 |
ARRA
| 4 |
AVEYRON
| 7 |
AVISIO
| 6 |
AVRE
| 4 |
BALCKWATER
| 10 |
BARROW
| 6 |
BARTSCH
| 7 |
BEGNAELF
| 8 |
BERAUN
| 6 |
BERESINA
| 8 |
BETSCHWA
| 8 |
BIALA
| 5 |
BINNA
| 5 |
BISTRI
| 6 |
BISTRITZA
| 9 |
BJELAJA
| 7 |
BLANITZ
| 7 |
BLAVET
| 6 |
BOBR
| 4 |
BODROG
| 6 |
BOGNA
| 5 |
BOJANA
| 6 |
BRADANO
| 7 |
BRAUNACH
| 8 |
BRENNO
| 6 |
BRENTA
| 6 |
BREUSCH
| 7 |
BRIGACH
| 7 |
BROYE
| 5 |
BUSENTO
| 7 |
BUZAU
| 5 |
BZURA
| 5 |
CHIESE
| 6 |
DALELF
| 6 |
DEARNE
| 6 |
DEIMA
| 5 |
DEMER
| 5 |
DENDER
| 6 |
DESNA
| 5 |
DEVOLL
| 6 |
DIEMEL
| 6 |
DIEVENOW
| 8 |
DINKEL
| 6 |
DNJESTR
| 7 |
DOMMEL
| 6 |
DREWENZ
| 7 |
DUERO
| 5 |
DURANCE
| 7 |
DYLE
| 4 |
EIPEL
| 5 |
EISACK
| 6 |
ELBING
| 6 |
ELBRING
| 7 |
EMBA
| 4 |
EMSCHER
| 7 |
ERLAUF
| 6 |
ERLITZ
| 6 |
ERZEN
| 5 |
EUROTAS
| 7 |
3 | |
GAIL
| 4 |
GALLEGO
| 7 |
GEESTE
| 6 |
GENIL
| 5 |
GERSPRENZ
| 9 |
GLOMMEN
| 7 |
GOETAELF
| 8 |
GRIFT
| 5 |
GUADALAVIAR
| 11 |
GUADALIMAR
| 10 |