eststo different estimates' names conditional on value of a macro inside loop

[Luiza Lins]

I have a loop that generates 24 regressions: 12 using an all boys sample, and 12 using an all girls sample. I'd like to store these regressions using eststo in a way that the boys sample regressions are called "boy1, boy2, ..., boy12", and the girls sample regression are called "girl1, girl2, ..., girl12".

I've tried so many local macro attemps but they are seem to fail. How can I do this? Below is my code right now, calling the estimates r1 to r24.

qui eststo clear
local i 1

foreach sample in 1 0{

    foreach sex in boys girls{
    
        forv st = 1(1)2{
            preserve
            keep if boy == `sample'
            
            eststo r`=`i'': reg delta_`sex'`st' $controls1, cluster($cluster_vars)
            estadd ysumm
            estadd local Mean = string(round(e(ymean), 0.01), "%9.2f")
            estadd local fe Yes
            
            local i = `i' + 1
            
            eststo r`=`i'': reg delta_`sex'`st' $controls2, cluster($cluster_vars)
            estadd ysumm
            estadd local Mean = string(round(e(ymean), 0.01), "%9.2f")
            estadd local fe Yes
            local i = `i' + 1
            
            eststo r`=`i'': reg delta_`sex'`st' $controls3 cluster($cluster_vars)
            estadd ysumm
            estadd local Mean = string(round(e(ymean), 0.01), "%9.2f")
            estadd local fe Yes
            local i = `i' + 1
            
            restore
            
        }
    }    
}

[Andrew Musau]

foreach sex in boys girls{
    forval i=1/12{
        display "`sex'`i'"
    }
}

With a counter, it works the same. Just reset the counter as sex iterates from boy to girl.

Res.:

. foreach sex in boys girls{
  2. 
.     forval i=1/12{
  3. 
.         display "`sex'`i'"
  4. 
.     }
  5. 
. }
boys1
boys2
boys3
boys4
boys5
boys6
boys7
boys8
boys9
boys10
boys11
boys12
girls1
girls2
girls3
girls4
girls5
girls6
girls7
girls8
girls9
girls10
girls11
girls12