#import <stdio.h>
typedef long long INT;
int main(){
    char c;
    INT b=0;
    INT ans=0;
    while((c=getchar())!=EOF){
        if (c=='B') b++;
        else if (c=='W') ans+=b;
        else break;
    }
    printf("%lld",ans);
}

; ModuleID = '/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_395/source.m'
source_filename = "/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_395/source.m"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@.str = private unnamed_addr constant [5 x i8] c"%lld\00", align 1
@stdin = external local_unnamed_addr global ptr, align 8

; Function Attrs: nofree nounwind uwtable
define dso_local i32 @main() local_unnamed_addr #0 {
entry:
  br label %while.cond.outer

while.cond.outer:                                 ; preds = %if.then, %entry
  %b.0.ph = phi i64 [ %inc, %if.then ], [ 0, %entry ]
  %ans.0.ph = phi i64 [ %ans.0, %if.then ], [ 0, %entry ]
  br label %while.cond

while.cond:                                       ; preds = %while.cond.outer, %if.then9
  %ans.0 = phi i64 [ %add, %if.then9 ], [ %ans.0.ph, %while.cond.outer ]
  %0 = load ptr, ptr @stdin, align 8, !tbaa !5
  %call.i = tail call i32 @getc(ptr noundef %0)
  %sext = shl i32 %call.i, 24
  switch i32 %sext, label %while.end [
    i32 1459617792, label %if.then9
    i32 1107296256, label %if.then
  ]

if.then:                                          ; preds = %while.cond
  %inc = add nuw nsw i64 %b.0.ph, 1
  br label %while.cond.outer

if.then9:                                         ; preds = %while.cond
  %add = add nsw i64 %ans.0, %b.0.ph
  br label %while.cond

while.end:                                        ; preds = %while.cond
  %call12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef %ans.0)
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @getc(ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.linker.options = !{}
!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"Ubuntu clang version 18.0.0 (++20231007042255+8abb2ace888b-1~exp1~20231007042414.1230)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
